Enforce Content-Type requirement on the rest layer and remove deprecated methods (#23146)

This commit enforces the requirement of Content-Type for the REST layer and removes the deprecated methods in transport
requests and their usages.

While doing this, it turns out that there are many places where *Entity classes are used from the apache http client
libraries and many of these usages did not specify the content type. The methods that do not specify a content type
explicitly have been added to forbidden apis to prevent more of these from entering our code base.

Relates #19388

buildSrc/src/main/groovy/org/elasticsearch/gradle/precommit/PrecommitTasks.groovy

@@ -91,6 +91,7 @@ class PrecommitTasks {
         if (testForbidden != null) {
             testForbidden.configure {
                 signaturesURLs += getClass().getResource('/forbidden/es-test-signatures.txt')
+                signaturesURLs += getClass().getResource('/forbidden/http-signatures.txt')
             }
         }
         Task forbiddenApis = project.tasks.findByName('forbiddenApis')

buildSrc/src/main/resources/forbidden/http-signatures.txt

@@ -0,0 +1,45 @@
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance  with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on
+# an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+# either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+
+@defaultMessage Explicitly specify the ContentType of HTTP entities when creating
+org.apache.http.entity.StringEntity#<init>(java.lang.String)
+org.apache.http.entity.StringEntity#<init>(java.lang.String,java.lang.String)
+org.apache.http.entity.StringEntity#<init>(java.lang.String,java.nio.charset.Charset)
+org.apache.http.entity.ByteArrayEntity#<init>(byte[])
+org.apache.http.entity.ByteArrayEntity#<init>(byte[],int,int)
+org.apache.http.entity.FileEntity#<init>(java.io.File)
+org.apache.http.entity.InputStreamEntity#<init>(java.io.InputStream)
+org.apache.http.entity.InputStreamEntity#<init>(java.io.InputStream,long)
+org.apache.http.nio.entity.NByteArrayEntity#<init>(byte[])
+org.apache.http.nio.entity.NByteArrayEntity#<init>(byte[],int,int)
+org.apache.http.nio.entity.NFileEntity#<init>(java.io.File)
+org.apache.http.nio.entity.NStringEntity#<init>(java.lang.String)
+org.apache.http.nio.entity.NStringEntity#<init>(java.lang.String,java.lang.String)
+
+@defaultMessage Use non-deprecated constructors
+org.apache.http.nio.entity.NFileEntity#<init>(java.io.File,java.lang.String)
+org.apache.http.nio.entity.NFileEntity#<init>(java.io.File,java.lang.String,boolean)
+org.apache.http.entity.FileEntity#<init>(java.io.File,java.lang.String)
+org.apache.http.entity.StringEntity#<init>(java.lang.String,java.lang.String,java.lang.String)
+
+@defaultMessage BasicEntity is easy to mess up and forget to set content type
+org.apache.http.entity.BasicHttpEntity#<init>()
+
+@defaultMessage EntityTemplate is easy to mess up and forget to set content type
+org.apache.http.entity.EntityTemplate#<init>(org.apache.http.entity.ContentProducer)
+
+@defaultMessage SerializableEntity uses java serialization and makes it easy to forget to set content type
+org.apache.http.entity.SerializableEntity#<init>(java.io.Serializable)

client/rest-high-level/build.gradle

@@ -1,3 +1,5 @@
+import org.elasticsearch.gradle.precommit.PrecommitTasks
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -39,3 +41,9 @@ dependencyLicenses {
     it.group.startsWith('org.elasticsearch') == false
   }
 }
+
+forbiddenApisMain {
+  // core does not depend on the httpclient for compile so we add the signatures here. We don't add them for test as they are already
+  // specified
+  signaturesURLs += [PrecommitTasks.getResource('/forbidden/http-signatures.txt')]
+}

client/rest-high-level/src/test/java/org/elasticsearch/client/RestHighLevelClientTests.java

@@ -27,7 +27,6 @@ import org.apache.http.HttpResponse;
 import org.apache.http.ProtocolVersion;
 import org.apache.http.RequestLine;
 import org.apache.http.StatusLine;
-import org.apache.http.entity.BasicHttpEntity;
 import org.apache.http.entity.ByteArrayEntity;
 import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
@@ -144,7 +143,7 @@ public class RestHighLevelClientTests extends ESTestCase {
         }
         {
             IllegalStateException ise = expectThrows(IllegalStateException.class,
-                    () -> RestHighLevelClient.parseEntity(new BasicHttpEntity(), null));
+                    () -> RestHighLevelClient.parseEntity(new StringEntity("", (ContentType) null), null));
             assertEquals("Elasticsearch didn't return the [Content-Type] header, unable to parse response body", ise.getMessage());
         }
         {

client/rest/build.gradle

@@ -49,8 +49,9 @@ dependencies {
 }
 
 forbiddenApisMain {
-  //client does not depend on core, so only jdk signatures should be checked
-  signaturesURLs = [PrecommitTasks.getResource('/forbidden/jdk-signatures.txt')]
+  //client does not depend on core, so only jdk and http signatures should be checked
+  signaturesURLs = [PrecommitTasks.getResource('/forbidden/jdk-signatures.txt'),
+                    PrecommitTasks.getResource('/forbidden/http-signatures.txt')]
 }
 
 forbiddenApisTest {
@@ -58,7 +59,8 @@ forbiddenApisTest {
   bundledSignatures -= 'jdk-non-portable'
   bundledSignatures += 'jdk-internal'
   //client does not depend on core, so only jdk signatures should be checked
-  signaturesURLs = [PrecommitTasks.getResource('/forbidden/jdk-signatures.txt')]
+  signaturesURLs = [PrecommitTasks.getResource('/forbidden/jdk-signatures.txt'),
+                    PrecommitTasks.getResource('/forbidden/http-signatures.txt')]
 }
 
 dependencyLicenses {

client/rest/src/test/java/org/elasticsearch/client/HeapBufferedAsyncResponseConsumerTests.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.client;
 
 import org.apache.http.ContentTooLongException;
+import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.ProtocolVersion;
 import org.apache.http.StatusLine;
@@ -32,6 +33,8 @@ import org.apache.http.nio.ContentDecoder;
 import org.apache.http.nio.IOControl;
 import org.apache.http.protocol.HttpContext;
 
+import java.util.concurrent.atomic.AtomicReference;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
@@ -56,7 +59,7 @@ public class HeapBufferedAsyncResponseConsumerTests extends RestClientTestCase {
         ProtocolVersion protocolVersion = new ProtocolVersion("HTTP", 1, 1);
         StatusLine statusLine = new BasicStatusLine(protocolVersion, 200, "OK");
         HttpResponse httpResponse = new BasicHttpResponse(statusLine);
-        httpResponse.setEntity(new StringEntity("test"));
+        httpResponse.setEntity(new StringEntity("test", ContentType.TEXT_PLAIN));
 
         //everything goes well
         consumer.responseReceived(httpResponse);
@@ -99,11 +102,17 @@ public class HeapBufferedAsyncResponseConsumerTests extends RestClientTestCase {
         StatusLine statusLine = new BasicStatusLine(protocolVersion, 200, "OK");
         consumer.onResponseReceived(new BasicHttpResponse(statusLine));
 
-        BasicHttpEntity entity = new BasicHttpEntity();
-        entity.setContentLength(randomInt(bufferLimit));
+        final AtomicReference<Long> contentLength = new AtomicReference<>();
+        HttpEntity entity = new StringEntity("", ContentType.APPLICATION_JSON) {
+            @Override
+            public long getContentLength() {
+                return contentLength.get();
+            }
+        };
+        contentLength.set(randomLong(bufferLimit));
         consumer.onEntityEnclosed(entity, ContentType.APPLICATION_JSON);
 
-        entity.setContentLength(randomIntBetween(bufferLimit + 1, MAX_TEST_BUFFER_SIZE));
+        contentLength.set(randomLongBetween(bufferLimit + 1, MAX_TEST_BUFFER_SIZE));
         try {
             consumer.onEntityEnclosed(entity, ContentType.APPLICATION_JSON);
         } catch(ContentTooLongException e) {

client/rest/src/test/java/org/elasticsearch/client/RequestLoggerTests.java

@@ -31,6 +31,7 @@ import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpPut;
 import org.apache.http.client.methods.HttpTrace;
 import org.apache.http.client.methods.HttpUriRequest;
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.InputStreamEntity;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.message.BasicHeader;
@@ -71,20 +72,21 @@ public class RequestLoggerTests extends RestClientTestCase {
             HttpEntity entity;
             switch(randomIntBetween(0, 4)) {
                 case 0:
-                    entity = new StringEntity(requestBody, StandardCharsets.UTF_8);
+                    entity = new StringEntity(requestBody, ContentType.APPLICATION_JSON);
                     break;
                 case 1:
-                    entity = new InputStreamEntity(new ByteArrayInputStream(requestBody.getBytes(StandardCharsets.UTF_8)));
+                    entity = new InputStreamEntity(new ByteArrayInputStream(requestBody.getBytes(StandardCharsets.UTF_8)),
+                        ContentType.APPLICATION_JSON);
                     break;
                 case 2:
-                    entity = new NStringEntity(requestBody, StandardCharsets.UTF_8);
+                    entity = new NStringEntity(requestBody, ContentType.APPLICATION_JSON);
                     break;
                 case 3:
-                    entity = new NByteArrayEntity(requestBody.getBytes(StandardCharsets.UTF_8));
+                    entity = new NByteArrayEntity(requestBody.getBytes(StandardCharsets.UTF_8), ContentType.APPLICATION_JSON);
                     break;
                 case 4:
                     // Evil entity without a charset
-                    entity = new StringEntity(requestBody, (Charset) null);
+                    entity = new StringEntity(requestBody, ContentType.create("application/json", (Charset) null));
                     break;
                 default:
                     throw new UnsupportedOperationException();
@@ -122,15 +124,16 @@ public class RequestLoggerTests extends RestClientTestCase {
             HttpEntity entity;
             switch(randomIntBetween(0, 2)) {
             case 0:
-                entity = new StringEntity(responseBody, StandardCharsets.UTF_8);
+                entity = new StringEntity(responseBody, ContentType.APPLICATION_JSON);
                 break;
             case 1:
                 //test a non repeatable entity
-                entity = new InputStreamEntity(new ByteArrayInputStream(responseBody.getBytes(StandardCharsets.UTF_8)));
+                entity = new InputStreamEntity(new ByteArrayInputStream(responseBody.getBytes(StandardCharsets.UTF_8)),
+                    ContentType.APPLICATION_JSON);
                 break;
             case 2:
                 // Evil entity without a charset
-                entity = new StringEntity(responseBody, (Charset) null);
+                entity = new StringEntity(responseBody, ContentType.create("application/json", (Charset) null));
                 break;
             default:
                 throw new UnsupportedOperationException();

client/rest/src/test/java/org/elasticsearch/client/ResponseExceptionTests.java

@@ -25,6 +25,7 @@ import org.apache.http.HttpResponse;
 import org.apache.http.ProtocolVersion;
 import org.apache.http.RequestLine;
 import org.apache.http.StatusLine;
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.InputStreamEntity;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.message.BasicHttpResponse;
@@ -52,10 +53,11 @@ public class ResponseExceptionTests extends RestClientTestCase {
         if (hasBody) {
             HttpEntity entity;
             if (getRandom().nextBoolean()) {
-                entity = new StringEntity(responseBody, StandardCharsets.UTF_8);
+                entity = new StringEntity(responseBody, ContentType.APPLICATION_JSON);
             } else {
                 //test a non repeatable entity
-                entity = new InputStreamEntity(new ByteArrayInputStream(responseBody.getBytes(StandardCharsets.UTF_8)));
+                entity = new InputStreamEntity(new ByteArrayInputStream(responseBody.getBytes(StandardCharsets.UTF_8)),
+                    ContentType.APPLICATION_JSON);
             }
             httpResponse.setEntity(entity);
         }

client/rest/src/test/java/org/elasticsearch/client/RestClientSingleHostIntegTests.java

@@ -28,6 +28,7 @@ import org.apache.http.Header;
 import org.apache.http.HttpHost;
 import org.apache.http.auth.AuthScope;
 import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.BasicCredentialsProvider;
 import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
@@ -249,7 +250,7 @@ public class RestClientSingleHostIntegTests extends RestClientTestCase {
 
     private Response bodyTest(final RestClient restClient, final String method) throws IOException {
         String requestBody = "{ \"field\": \"value\" }";
-        StringEntity entity = new StringEntity(requestBody);
+        StringEntity entity = new StringEntity(requestBody, ContentType.APPLICATION_JSON);
         int statusCode = randomStatusCode(getRandom());
         Response esResponse;
         try {

client/rest/src/test/java/org/elasticsearch/client/RestClientSingleHostTests.java

@@ -38,6 +38,7 @@ import org.apache.http.client.protocol.HttpClientContext;
 import org.apache.http.client.utils.URIBuilder;
 import org.apache.http.concurrent.FutureCallback;
 import org.apache.http.conn.ConnectTimeoutException;
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.auth.BasicScheme;
 import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
@@ -293,7 +294,7 @@ public class RestClientSingleHostTests extends RestClientTestCase {
      */
     public void testBody() throws IOException {
         String body = "{ \"field\": \"value\" }";
-        StringEntity entity = new StringEntity(body);
+        StringEntity entity = new StringEntity(body, ContentType.APPLICATION_JSON);
         for (String method : Arrays.asList("DELETE", "GET", "PATCH", "POST", "PUT")) {
             for (int okStatusCode : getOkStatusCodes()) {
                 Response response = restClient.performRequest(method, "/" + okStatusCode, Collections.<String, String>emptyMap(), entity);
@@ -431,7 +432,7 @@ public class RestClientSingleHostTests extends RestClientTestCase {
         HttpEntity entity = null;
         boolean hasBody = request instanceof HttpEntityEnclosingRequest && getRandom().nextBoolean();
         if (hasBody) {
-            entity = new StringEntity(randomAsciiOfLengthBetween(10, 100));
+            entity = new StringEntity(randomAsciiOfLengthBetween(10, 100), ContentType.APPLICATION_JSON);
             ((HttpEntityEnclosingRequest) request).setEntity(entity);
         }
 

core/src/main/java/org/elasticsearch/action/admin/cluster/repositories/put/PutRepositoryRequest.java

@@ -139,19 +139,6 @@ public class PutRepositoryRequest extends AcknowledgedRequest<PutRepositoryReque
         return this;
     }
 
-    /**
-     * Sets the repository settings.
-     *
-     * @param source repository settings in json or yaml format
-     * @return this request
-     * @deprecated use {@link #settings(String, XContentType)} to avoid content type auto-detection
-     */
-    @Deprecated
-    public PutRepositoryRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets the repository settings.
      *

core/src/main/java/org/elasticsearch/action/admin/cluster/repositories/put/PutRepositoryRequestBuilder.java

@@ -89,19 +89,6 @@ public class PutRepositoryRequestBuilder extends AcknowledgedRequestBuilder<PutR
         return this;
     }
 
-    /**
-     * Sets the repository settings in Json or Yaml format
-     *
-     * @param source repository settings
-     * @return this builder
-     * @deprecated use {@link #setSettings(String, XContentType)} instead to avoid content type auto detection
-     */
-    @Deprecated
-    public PutRepositoryRequestBuilder setSettings(String source) {
-        request.settings(source);
-        return this;
-    }
-
     /**
      * Sets the repository settings in Json or Yaml format
      *

core/src/main/java/org/elasticsearch/action/admin/cluster/settings/ClusterUpdateSettingsRequest.java

@@ -81,16 +81,6 @@ public class ClusterUpdateSettingsRequest extends AcknowledgedRequest<ClusterUpd
         return this;
     }
 
-    /**
-     * Sets the source containing the transient settings to be updated. They will not survive a full cluster restart
-     * @deprecated use {@link #transientSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public ClusterUpdateSettingsRequest transientSettings(String source) {
-        this.transientSettings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets the source containing the transient settings to be updated. They will not survive a full cluster restart
      */
@@ -130,16 +120,6 @@ public class ClusterUpdateSettingsRequest extends AcknowledgedRequest<ClusterUpd
         return this;
     }
 
-    /**
-     * Sets the source containing the persistent settings to be updated. They will get applied cross restarts
-     * @deprecated use {@link #persistentSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public ClusterUpdateSettingsRequest persistentSettings(String source) {
-        this.persistentSettings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets the source containing the persistent settings to be updated. They will get applied cross restarts
      */

core/src/main/java/org/elasticsearch/action/admin/cluster/settings/ClusterUpdateSettingsRequestBuilder.java

@@ -51,16 +51,6 @@ public class ClusterUpdateSettingsRequestBuilder extends AcknowledgedRequestBuil
         return this;
     }
 
-    /**
-     * Sets the source containing the transient settings to be updated. They will not survive a full cluster restart
-     * @deprecated use {@link #setTransientSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public ClusterUpdateSettingsRequestBuilder setTransientSettings(String settings) {
-        request.transientSettings(settings);
-        return this;
-    }
-
     /**
      * Sets the source containing the transient settings to be updated. They will not survive a full cluster restart
      */
@@ -93,16 +83,6 @@ public class ClusterUpdateSettingsRequestBuilder extends AcknowledgedRequestBuil
         return this;
     }
 
-    /**
-     * Sets the source containing the persistent settings to be updated. They will get applied cross restarts
-     * @deprecated use {@link #setPersistentSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public ClusterUpdateSettingsRequestBuilder setPersistentSettings(String settings) {
-        request.persistentSettings(settings);
-        return this;
-    }
-
     /**
      * Sets the source containing the persistent settings to be updated. They will get applied cross restarts
      */

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/create/CreateSnapshotRequest.java

@@ -287,21 +287,6 @@ public class CreateSnapshotRequest extends MasterNodeRequest<CreateSnapshotReque
         return this;
     }
 
-    /**
-     * Sets repository-specific snapshot settings in JSON or YAML format
-     * <p>
-     * See repository documentation for more information.
-     *
-     * @param source repository-specific snapshot settings
-     * @return this request
-     * @deprecated use {@link #settings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public CreateSnapshotRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets repository-specific snapshot settings in JSON or YAML format
      * <p>

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/create/CreateSnapshotRequestBuilder.java

@@ -141,21 +141,6 @@ public class CreateSnapshotRequestBuilder extends MasterNodeOperationRequestBuil
         return this;
     }
 
-    /**
-     * Sets repository-specific snapshot settings in YAML, JSON or properties format
-     * <p>
-     * See repository documentation for more information.
-     *
-     * @param source repository-specific snapshot settings
-     * @return this builder
-     * @deprecated use {@link #setSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public CreateSnapshotRequestBuilder setSettings(String source) {
-        request.settings(source);
-        return this;
-    }
-
     /**
      * Sets repository-specific snapshot settings in YAML or JSON format
      * <p>

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/restore/RestoreSnapshotRequest.java

@@ -312,21 +312,6 @@ public class RestoreSnapshotRequest extends MasterNodeRequest<RestoreSnapshotReq
         return this;
     }
 
-    /**
-     * Sets repository-specific restore settings in JSON or YAML format
-     * <p>
-     * See repository documentation for more information.
-     *
-     * @param source repository-specific snapshot settings
-     * @return this request
-     * @deprecated use {@link #settings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public RestoreSnapshotRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets repository-specific restore settings in JSON or YAML format
      * <p>
@@ -450,16 +435,6 @@ public class RestoreSnapshotRequest extends MasterNodeRequest<RestoreSnapshotReq
         return this;
     }
 
-    /**
-     * Sets settings that should be added/changed in all restored indices
-     * @deprecated use {@link #indexSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public RestoreSnapshotRequest indexSettings(String source) {
-        this.indexSettings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets settings that should be added/changed in all restored indices
      */

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/restore/RestoreSnapshotRequestBuilder.java

@@ -153,21 +153,6 @@ public class RestoreSnapshotRequestBuilder extends MasterNodeOperationRequestBui
         return this;
     }
 
-    /**
-     * Sets repository-specific restore settings in JSON or YAML format
-     * <p>
-     * See repository documentation for more information.
-     *
-     * @param source repository-specific snapshot settings
-     * @return this builder
-     * @deprecated use {@link #setSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public RestoreSnapshotRequestBuilder setSettings(String source) {
-        request.settings(source);
-        return this;
-    }
-
     /**
      * Sets repository-specific restore settings in JSON or YAML format
      * <p>
@@ -263,19 +248,6 @@ public class RestoreSnapshotRequestBuilder extends MasterNodeOperationRequestBui
         return this;
     }
 
-    /**
-     * Sets index settings that should be added or replaced during restore
-     *
-     * @param source index settings
-     * @return this builder
-     * @deprecated use {@link #setIndexSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public RestoreSnapshotRequestBuilder setIndexSettings(String source) {
-        request.indexSettings(source);
-        return this;
-    }
-
     /**
      * Sets index settings that should be added or replaced during restore
      *

core/src/main/java/org/elasticsearch/action/admin/cluster/storedscripts/PutStoredScriptRequest.java

@@ -45,11 +45,6 @@ public class PutStoredScriptRequest extends AcknowledgedRequest<PutStoredScriptR
         super();
     }
 
-    @Deprecated
-    public PutStoredScriptRequest(String id, String lang, BytesReference content) {
-        this(id, lang, content, XContentFactory.xContentType(content));
-    }
-
     public PutStoredScriptRequest(String id, String lang, BytesReference content, XContentType xContentType) {
         super();
         this.id = id;
@@ -107,15 +102,6 @@ public class PutStoredScriptRequest extends AcknowledgedRequest<PutStoredScriptR
         return xContentType;
     }
 
-    /**
-     * Set the script source using bytes.
-     * @deprecated this method is deprecated as it relies on content type detection. Use {@link #content(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public PutStoredScriptRequest content(BytesReference content) {
-        return content(content, XContentFactory.xContentType(content));
-    }
-
     /**
      * Set the script source and the content type of the bytes.
      */

core/src/main/java/org/elasticsearch/action/admin/cluster/storedscripts/PutStoredScriptRequestBuilder.java

@@ -36,16 +36,6 @@ public class PutStoredScriptRequestBuilder extends AcknowledgedRequestBuilder<Pu
         return this;
     }
 
-    /**
-     * Set the source of the script.
-     * @deprecated this method requires content type detection. Use {@link #setContent(BytesReference, XContentType)} instead
-     */
-    @Deprecated
-    public PutStoredScriptRequestBuilder setContent(BytesReference content) {
-        request.content(content);
-        return this;
-    }
-
     /**
      * Set the source of the script along with the content type of the source
      */

core/src/main/java/org/elasticsearch/action/admin/indices/create/CreateIndexRequest.java

@@ -170,16 +170,6 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
         return this;
     }
 
-    /**
-     * The settings to create the index with (either json or yaml format)
-     * @deprecated use {@link #source(String, XContentType)} instead to avoid content type detection
-     */
-    @Deprecated
-    public CreateIndexRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * The settings to create the index with (either json or yaml format)
      */
@@ -215,18 +205,6 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
         return this;
     }
 
-    /**
-     * Adds mapping that will be added when the index gets created.
-     *
-     * @param type   The mapping type
-     * @param source The mapping source
-     * @deprecated use {@link #mapping(String, String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public CreateIndexRequest mapping(String type, String source) {
-        return mapping(type, new BytesArray(source), XContentFactory.xContentType(source));
-    }
-
     /**
      * Adds mapping that will be added when the index gets created.
      *
@@ -362,15 +340,6 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
         return this;
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #source(String, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequest source(String source) {
-        return source(new BytesArray(source));
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */
@@ -382,16 +351,7 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
      * Sets the settings and mappings as a single source.
      */
     public CreateIndexRequest source(XContentBuilder source) {
-        return source(source.bytes());
-    }
-
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #source(byte[], XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequest source(byte[] source) {
-        return source(source, 0, source.length);
+        return source(source.bytes(), source.contentType());
     }
 
     /**
@@ -401,15 +361,6 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
         return source(source, 0, source.length, xContentType);
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #source(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequest source(byte[] source, int offset, int length) {
-        return source(new BytesArray(source, offset, length));
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */
@@ -417,17 +368,6 @@ public class CreateIndexRequest extends AcknowledgedRequest<CreateIndexRequest>
         return source(new BytesArray(source, offset, length), xContentType);
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #source(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequest source(BytesReference source) {
-        XContentType xContentType = XContentFactory.xContentType(source);
-        source(source, xContentType);
-        return this;
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */

core/src/main/java/org/elasticsearch/action/admin/indices/create/CreateIndexRequestBuilder.java

@@ -110,19 +110,6 @@ public class CreateIndexRequestBuilder extends AcknowledgedRequestBuilder<Create
         return this;
     }
 
-    /**
-     * Adds mapping that will be added when the index gets created.
-     *
-     * @param type   The mapping type
-     * @param source The mapping source
-     * @deprecated use {@link #addMapping(String, String, XContentType)} to avoid content type auto-detection
-     */
-    @Deprecated
-    public CreateIndexRequestBuilder addMapping(String type, String source) {
-        request.mapping(type, source);
-        return this;
-    }
-
     /**
      * Adds mapping that will be added when the index gets created.
      *
@@ -214,16 +201,6 @@ public class CreateIndexRequestBuilder extends AcknowledgedRequestBuilder<Create
         return this;
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #setSource(String, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequestBuilder setSource(String source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */
@@ -232,16 +209,6 @@ public class CreateIndexRequestBuilder extends AcknowledgedRequestBuilder<Create
         return this;
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #setSource(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequestBuilder setSource(BytesReference source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */
@@ -250,16 +217,6 @@ public class CreateIndexRequestBuilder extends AcknowledgedRequestBuilder<Create
         return this;
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #setSource(byte[], XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequestBuilder setSource(byte[] source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */
@@ -268,16 +225,6 @@ public class CreateIndexRequestBuilder extends AcknowledgedRequestBuilder<Create
         return this;
     }
 
-    /**
-     * Sets the settings and mappings as a single source.
-     * @deprecated use {@link #setSource(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public CreateIndexRequestBuilder setSource(byte[] source, int offset, int length) {
-        request.source(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the settings and mappings as a single source.
      */

core/src/main/java/org/elasticsearch/action/admin/indices/mapping/put/PutMappingRequest.java

@@ -270,15 +270,6 @@ public class PutMappingRequest extends AcknowledgedRequest<PutMappingRequest> im
         }
     }
 
-    /**
-     * The mapping source definition.
-     * @deprecated use {@link #source(String, XContentType)}
-     */
-    @Deprecated
-    public PutMappingRequest source(String mappingSource) {
-        return source(mappingSource, XContentFactory.xContentType(mappingSource));
-    }
-
     /**
      * The mapping source definition.
      */

core/src/main/java/org/elasticsearch/action/admin/indices/mapping/put/PutMappingRequestBuilder.java

@@ -81,16 +81,6 @@ public class PutMappingRequestBuilder extends AcknowledgedRequestBuilder<PutMapp
         return this;
     }
 
-    /**
-     * The mapping source definition.
-     * @deprecated use {@link #setSource(String, XContentType)}
-     */
-    @Deprecated
-    public PutMappingRequestBuilder setSource(String mappingSource) {
-        request.source(mappingSource);
-        return this;
-    }
-
     /**
      * The mapping source definition.
      */

core/src/main/java/org/elasticsearch/action/admin/indices/settings/put/UpdateSettingsRequest.java

@@ -120,16 +120,6 @@ public class UpdateSettingsRequest extends AcknowledgedRequest<UpdateSettingsReq
         return this;
     }
 
-    /**
-     * Sets the settings to be updated (either json or yaml format)
-     * @deprecated use {@link #settings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public UpdateSettingsRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * Sets the settings to be updated (either json or yaml format)
      */

core/src/main/java/org/elasticsearch/action/admin/indices/settings/put/UpdateSettingsRequestBuilder.java

@@ -70,16 +70,6 @@ public class UpdateSettingsRequestBuilder extends AcknowledgedRequestBuilder<Upd
         return this;
     }
 
-    /**
-     * Sets the settings to be updated (either json or yaml format)
-     * @deprecated use {@link #setSettings(String, XContentType)} to avoid content type detection
-     */
-    @Deprecated
-    public UpdateSettingsRequestBuilder setSettings(String source) {
-        request.settings(source);
-        return this;
-    }
-
     /**
      * Sets the settings to be updated (either json or yaml format)
      */

core/src/main/java/org/elasticsearch/action/admin/indices/template/put/PutIndexTemplateRequest.java

@@ -180,16 +180,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return this;
     }
 
-    /**
-     * The settings to create the index template with (either json/yaml format).
-     * @deprecated use {@link #settings(String, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest settings(String source) {
-        this.settings = Settings.builder().loadFromSource(source).build();
-        return this;
-    }
-
     /**
      * The settings to create the index template with (either json/yaml format).
      */
@@ -216,19 +206,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return this.settings;
     }
 
-    /**
-     * Adds mapping that will be added when the index gets created.
-     *
-     * @param type   The mapping type
-     * @param source The mapping source
-     * @deprecated use {@link #mapping(String, String, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest mapping(String type, String source) {
-        XContentType xContentType = XContentFactory.xContentType(source);
-        return mapping(type, source, xContentType);
-    }
-
     /**
      * Adds mapping that will be added when the index gets created.
      *
@@ -385,15 +362,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return this;
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #source(String, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest source(String templateSource) {
-        return source(XContentHelper.convertToMap(XContentFactory.xContent(templateSource), templateSource, true));
-    }
-
     /**
      * The template source definition.
      */
@@ -401,15 +369,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return source(XContentHelper.convertToMap(xContentType.xContent(), templateSource, true));
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #source(byte[], XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest source(byte[] source) {
-        return source(source, 0, source.length);
-    }
-
     /**
      * The template source definition.
      */
@@ -417,15 +376,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return source(source, 0, source.length, xContentType);
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #source(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest source(byte[] source, int offset, int length) {
-        return source(new BytesArray(source, offset, length));
-    }
-
     /**
      * The template source definition.
      */
@@ -433,15 +383,6 @@ public class PutIndexTemplateRequest extends MasterNodeRequest<PutIndexTemplateR
         return source(new BytesArray(source, offset, length), xContentType);
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #source(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequest source(BytesReference source) {
-        return source(XContentHelper.convertToMap(source, true).v2());
-    }
-
     /**
      * The template source definition.
      */

core/src/main/java/org/elasticsearch/action/admin/indices/template/put/PutIndexTemplateRequestBuilder.java

@@ -100,16 +100,6 @@ public class PutIndexTemplateRequestBuilder
         return this;
     }
 
-    /**
-     * The settings to crete the index template with (either json or yaml format)
-     * @deprecated use {@link #setSettings(String, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder setSettings(String source) {
-        request.settings(source);
-        return this;
-    }
-
     /**
      * The settings to crete the index template with (either json or yaml format)
      */
@@ -126,19 +116,6 @@ public class PutIndexTemplateRequestBuilder
         return this;
     }
 
-    /**
-     * Adds mapping that will be added when the index template gets created.
-     *
-     * @param type   The mapping type
-     * @param source The mapping source
-     * @deprecated use {@link #addMapping(String, String, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder addMapping(String type, String source) {
-        request.mapping(type, source);
-        return this;
-    }
-
     /**
      * Adds mapping that will be added when the index template gets created.
      *
@@ -249,16 +226,6 @@ public class PutIndexTemplateRequestBuilder
         return this;
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #setSource(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder setSource(String templateSource) {
-        request.source(templateSource);
-        return this;
-    }
-
     /**
      * The template source definition.
      */
@@ -267,26 +234,6 @@ public class PutIndexTemplateRequestBuilder
         return this;
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #setSource(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder setSource(BytesReference templateSource) {
-        request.source(templateSource);
-        return this;
-    }
-
-    /**
-     * The template source definition.
-     * @deprecated use {@link #setSource(byte[], XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder setSource(byte[] templateSource) {
-        request.source(templateSource);
-        return this;
-    }
-
     /**
      * The template source definition.
      */
@@ -295,16 +242,6 @@ public class PutIndexTemplateRequestBuilder
         return this;
     }
 
-    /**
-     * The template source definition.
-     * @deprecated use {@link #setSource(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public PutIndexTemplateRequestBuilder setSource(byte[] templateSource, int offset, int length) {
-        request.source(templateSource, offset, length);
-        return this;
-    }
-
     /**
      * The template source definition.
      */

core/src/main/java/org/elasticsearch/action/bulk/BulkProcessor.java

@@ -289,15 +289,6 @@ public class BulkProcessor implements Closeable {
         executeIfNeeded();
     }
 
-    /**
-     * Adds the data from the bytes to be processed by the bulk processor
-     * @deprecated use {@link #add(BytesReference, String, String, XContentType)} instead to avoid content type auto-detection
-     */
-    @Deprecated
-    public BulkProcessor add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType) throws Exception {
-        return add(data, defaultIndex, defaultType, null, null);
-    }
-
     /**
      * Adds the data from the bytes to be processed by the bulk processor
      */
@@ -306,19 +297,6 @@ public class BulkProcessor implements Closeable {
         return add(data, defaultIndex, defaultType, null, null, xContentType);
     }
 
-    /**
-     * Adds the data from the bytes to be processed by the bulk processor
-     * @deprecated use {@link #add(BytesReference, String, String, String, Object, XContentType)} instead to avoid content type
-     * auto-detection
-     */
-    @Deprecated
-    public synchronized BulkProcessor add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType,
-                                          @Nullable String defaultPipeline, @Nullable Object payload) throws Exception {
-        bulkRequest.add(data, defaultIndex, defaultType, null, null, null, defaultPipeline, payload, true);
-        executeIfNeeded();
-        return this;
-    }
-
     /**
      * Adds the data from the bytes to be processed by the bulk processor
      */

core/src/main/java/org/elasticsearch/action/bulk/BulkRequest.java

@@ -243,15 +243,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
         return sizeInBytes;
     }
 
-    /**
-     * Adds a framed data in binary format
-     * @deprecated use {@link #add(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public BulkRequest add(byte[] data, int from, int length) throws IOException {
-        return add(data, from, length, null, null);
-    }
-
     /**
      * Adds a framed data in binary format
      */
@@ -259,15 +250,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
         return add(data, from, length, null, null, xContentType);
     }
 
-    /**
-     * Adds a framed data in binary format
-     * @deprecated use {@link #add(byte[], int, int, String, String, XContentType)}
-     */
-    @Deprecated
-    public BulkRequest add(byte[] data, int from, int length, @Nullable String defaultIndex, @Nullable String defaultType) throws IOException {
-        return add(new BytesArray(data, from, length), defaultIndex, defaultType);
-    }
-
     /**
      * Adds a framed data in binary format
      */
@@ -276,16 +258,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
         return add(new BytesArray(data, from, length), defaultIndex, defaultType, xContentType);
     }
 
-    /**
-     * Adds a framed data in binary format
-     *
-     * @deprecated use {@link #add(BytesReference, String, String, XContentType)}
-     */
-    @Deprecated
-    public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType) throws IOException {
-        return add(data, defaultIndex, defaultType, null, null, null, null, null, true);
-    }
-
     /**
      * Adds a framed data in binary format
      */
@@ -294,16 +266,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
         return add(data, defaultIndex, defaultType, null, null, null, null, null, true, xContentType);
     }
 
-    /**
-     * Adds a framed data in binary format
-     *
-     * @deprecated use {@link #add(BytesReference, String, String, boolean, XContentType)}
-     */
-    @Deprecated
-    public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, boolean allowExplicitIndex) throws IOException {
-        return add(data, defaultIndex, defaultType, null, null, null, null, null, allowExplicitIndex);
-    }
-
     /**
      * Adds a framed data in binary format
      */
@@ -312,13 +274,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
         return add(data, defaultIndex, defaultType, null, null, null, null, null, allowExplicitIndex, xContentType);
     }
 
-    @Deprecated
-    public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, @Nullable String defaultRouting, @Nullable String[] defaultFields, @Nullable FetchSourceContext defaultFetchSourceContext, @Nullable String defaultPipeline, @Nullable Object payload, boolean allowExplicitIndex) throws IOException {
-        XContentType xContentType = XContentFactory.xContentType(data);
-        return add(data, defaultIndex, defaultType, defaultRouting, defaultFields, defaultFetchSourceContext, defaultPipeline, payload,
-            allowExplicitIndex, xContentType);
-    }
-
     public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, @Nullable String
         defaultRouting, @Nullable String[] defaultFields, @Nullable FetchSourceContext defaultFetchSourceContext, @Nullable String
         defaultPipeline, @Nullable Object payload, boolean allowExplicitIndex, XContentType xContentType) throws IOException {

core/src/main/java/org/elasticsearch/action/bulk/BulkRequestBuilder.java

@@ -96,16 +96,6 @@ public class BulkRequestBuilder extends ActionRequestBuilder<BulkRequest, BulkRe
         return this;
     }
 
-    /**
-     * Adds a framed data in binary format
-     * @deprecated use {@link #add(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public BulkRequestBuilder add(byte[] data, int from, int length) throws Exception {
-        request.add(data, from, length, null, null);
-        return this;
-    }
-
     /**
      * Adds a framed data in binary format
      */
@@ -114,16 +104,6 @@ public class BulkRequestBuilder extends ActionRequestBuilder<BulkRequest, BulkRe
         return this;
     }
 
-    /**
-     * Adds a framed data in binary format
-     * @deprecated use {@link #add(byte[], int, int, String, String, XContentType)}
-     */
-    @Deprecated
-    public BulkRequestBuilder add(byte[] data, int from, int length, @Nullable String defaultIndex, @Nullable String defaultType) throws Exception {
-        request.add(data, from, length, defaultIndex, defaultType);
-        return this;
-    }
-
     /**
      * Adds a framed data in binary format
      */

core/src/main/java/org/elasticsearch/action/index/IndexRequest.java

@@ -121,7 +121,7 @@ public class IndexRequest extends ReplicatedWriteRequest<IndexRequest> implement
 
     /**
      * Constructs a new index request against the specific index and type. The
-     * {@link #source(byte[])} must be set.
+     * {@link #source(byte[], XContentType)} must be set.
      */
     public IndexRequest(String index, String type) {
         this.index = index;
@@ -316,16 +316,6 @@ public class IndexRequest extends ReplicatedWriteRequest<IndexRequest> implement
         }
     }
 
-    /**
-     * Sets the document source to index.
-     *
-     * @deprecated use {@link #source(String, XContentType)}
-     */
-    @Deprecated
-    public IndexRequest source(String source) {
-        return source(new BytesArray(source), XContentFactory.xContentType(source));
-    }
-
     /**
      * Sets the document source to index.
      *
@@ -383,16 +373,6 @@ public class IndexRequest extends ReplicatedWriteRequest<IndexRequest> implement
         }
     }
 
-    /**
-     * Sets the document to index in bytes form.
-     * @deprecated use {@link #source(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public IndexRequest source(BytesReference source) {
-        return source(source, XContentFactory.xContentType(source));
-
-    }
-
     /**
      * Sets the document to index in bytes form.
      */
@@ -402,15 +382,6 @@ public class IndexRequest extends ReplicatedWriteRequest<IndexRequest> implement
         return this;
     }
 
-    /**
-     * Sets the document to index in bytes form.
-     * @deprecated use {@link #source(byte[], XContentType)}
-     */
-    @Deprecated
-    public IndexRequest source(byte[] source) {
-        return source(source, 0, source.length);
-    }
-
     /**
      * Sets the document to index in bytes form.
      */
@@ -418,20 +389,6 @@ public class IndexRequest extends ReplicatedWriteRequest<IndexRequest> implement
         return source(source, 0, source.length, xContentType);
     }
 
-    /**
-     * Sets the document to index in bytes form (assumed to be safe to be used from different
-     * threads).
-     *
-     * @param source The source to index
-     * @param offset The offset in the byte array
-     * @param length The length of the data
-     * @deprecated use {@link #source(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public IndexRequest source(byte[] source, int offset, int length) {
-        return source(new BytesArray(source, offset, length), XContentFactory.xContentType(source));
-    }
-
     /**
      * Sets the document to index in bytes form (assumed to be safe to be used from different
      * threads).

core/src/main/java/org/elasticsearch/action/index/IndexRequestBuilder.java

@@ -80,16 +80,6 @@ public class IndexRequestBuilder extends ReplicationRequestBuilder<IndexRequest,
         return this;
     }
 
-    /**
-     * Sets the source.
-     * @deprecated use {@link #setSource(BytesReference, XContentType)}
-     */
-    @Deprecated
-    public IndexRequestBuilder setSource(BytesReference source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the source.
      */
@@ -118,19 +108,6 @@ public class IndexRequestBuilder extends ReplicationRequestBuilder<IndexRequest,
         return this;
     }
 
-    /**
-     * Sets the document source to index.
-     * <p>
-     * Note, its preferable to either set it using {@link #setSource(org.elasticsearch.common.xcontent.XContentBuilder)}
-     * or using the {@link #setSource(byte[], XContentType)}.
-     * @deprecated use {@link #setSource(String, XContentType)}
-     */
-    @Deprecated
-    public IndexRequestBuilder setSource(String source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the document source to index.
      * <p>
@@ -150,16 +127,6 @@ public class IndexRequestBuilder extends ReplicationRequestBuilder<IndexRequest,
         return this;
     }
 
-    /**
-     * Sets the document to index in bytes form.
-     * @deprecated use {@link #setSource(byte[], XContentType)}
-     */
-    @Deprecated
-    public IndexRequestBuilder setSource(byte[] source) {
-        request.source(source);
-        return this;
-    }
-
     /**
      * Sets the document to index in bytes form.
      */
@@ -168,21 +135,6 @@ public class IndexRequestBuilder extends ReplicationRequestBuilder<IndexRequest,
         return this;
     }
 
-    /**
-     * Sets the document to index in bytes form (assumed to be safe to be used from different
-     * threads).
-     *
-     * @param source The source to index
-     * @param offset The offset in the byte array
-     * @param length The length of the data
-     * @deprecated use {@link #setSource(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public IndexRequestBuilder setSource(byte[] source, int offset, int length) {
-        request.source(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the document to index in bytes form (assumed to be safe to be used from different
      * threads).

core/src/main/java/org/elasticsearch/action/update/UpdateRequest.java

@@ -553,16 +553,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #doc(String, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest doc(String source) {
-        safeDoc().source(source);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -571,16 +561,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #doc(byte[], XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest doc(byte[] source) {
-        safeDoc().source(source);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -589,16 +569,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #doc(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest doc(byte[] source, int offset, int length) {
-        safeDoc().source(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -669,16 +639,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #upsert(String, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest upsert(String source) {
-        safeUpsertRequest().source(source);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */
@@ -687,16 +647,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #upsert(byte[], XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest upsert(byte[] source) {
-        safeUpsertRequest().source(source);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */
@@ -705,16 +655,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #upsert(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequest upsert(byte[] source, int offset, int length) {
-        safeUpsertRequest().source(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */

core/src/main/java/org/elasticsearch/action/update/UpdateRequestBuilder.java

@@ -221,16 +221,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #setDoc(String, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setDoc(String source) {
-        request.doc(source);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -239,16 +229,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #setDoc(byte[], XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setDoc(byte[] source) {
-        request.doc(source);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -257,16 +237,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc to use for updates when a script is not specified.
-     * @deprecated use {@link #setDoc(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setDoc(byte[] source, int offset, int length) {
-        request.doc(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the doc to use for updates when a script is not specified.
      */
@@ -326,16 +296,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #setUpsert(String, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setUpsert(String source) {
-        request.upsert(source);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */
@@ -344,16 +304,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #setDoc(byte[], XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setUpsert(byte[] source) {
-        request.upsert(source);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */
@@ -362,16 +312,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Sets the doc source of the update request to be used when the document does not exists.
-     * @deprecated use {@link #setUpsert(byte[], int, int, XContentType)}
-     */
-    @Deprecated
-    public UpdateRequestBuilder setUpsert(byte[] source, int offset, int length) {
-        request.upsert(source, offset, length);
-        return this;
-    }
-
     /**
      * Sets the doc source of the update request to be used when the document does not exists.
      */

core/src/main/java/org/elasticsearch/cluster/action/index/MappingUpdatedAction.java

@@ -29,6 +29,7 @@ import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Setting.Property;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.mapper.Mapping;
@@ -68,7 +69,7 @@ public class MappingUpdatedAction extends AbstractComponent {
         if (type.equals(MapperService.DEFAULT_MAPPING)) {
             throw new IllegalArgumentException("_default_ mapping should not be updated");
         }
-        return client.preparePutMapping().setConcreteIndex(index).setType(type).setSource(mappingUpdate.toString())
+        return client.preparePutMapping().setConcreteIndex(index).setType(type).setSource(mappingUpdate.toString(), XContentType.JSON)
                 .setMasterNodeTimeout(timeout).setTimeout(timeout);
     }
 

core/src/main/java/org/elasticsearch/http/HttpTransportSettings.java

@@ -19,6 +19,7 @@
 
 package org.elasticsearch.http;
 
+import org.elasticsearch.common.Booleans;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Setting.Property;
 import org.elasticsearch.common.transport.PortsRange;
@@ -69,7 +70,14 @@ public final class HttpTransportSettings {
     public static final Setting<Boolean> SETTING_HTTP_DETAILED_ERRORS_ENABLED =
         Setting.boolSetting("http.detailed_errors.enabled", true, Property.NodeScope);
     public static final Setting<Boolean> SETTING_HTTP_CONTENT_TYPE_REQUIRED =
-        Setting.boolSetting("http.content_type.required", false, Property.NodeScope);
+        new Setting<>("http.content_type.required", (s) -> Boolean.toString(true), (s) -> {
+            final boolean value = Booleans.parseBoolean(s);
+            if (value == false) {
+                throw new IllegalArgumentException("http.content_type.required cannot be set to false. It exists only to make a rolling" +
+                    " upgrade easier");
+            }
+            return true;
+        }, Property.NodeScope, Property.Deprecated);
     public static final Setting<ByteSizeValue> SETTING_HTTP_MAX_CONTENT_LENGTH =
         Setting.byteSizeSetting("http.max_content_length", new ByteSizeValue(100, ByteSizeUnit.MB), Property.NodeScope);
     public static final Setting<ByteSizeValue> SETTING_HTTP_MAX_CHUNK_SIZE =

core/src/main/java/org/elasticsearch/indices/IndicesService.java

@@ -69,6 +69,7 @@ import org.elasticsearch.common.util.iterable.Iterables;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.env.ShardLock;
 import org.elasticsearch.env.ShardLockObtainFailedException;
@@ -509,7 +510,7 @@ public class IndicesService extends AbstractLifecycleComponent
                     client.admin().indices().preparePutMapping()
                         .setConcreteIndex(shardRouting.index()) // concrete index - no name clash, it uses uuid
                         .setType(type)
-                        .setSource(mapping.source().string())
+                        .setSource(mapping.source().string(), XContentType.JSON)
                         .get();
                 } catch (IOException ex) {
                     throw new ElasticsearchException("failed to stringify mapping source", ex);

core/src/main/java/org/elasticsearch/rest/RestController.java

@@ -34,10 +34,8 @@ import org.elasticsearch.common.path.PathTrie;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.common.xcontent.XContentBuilder;
-import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.http.HttpServerTransport;
-import org.elasticsearch.http.HttpTransportSettings;
 import org.elasticsearch.indices.breaker.CircuitBreakerService;
 
 import java.io.ByteArrayOutputStream;
@@ -75,10 +73,6 @@ public class RestController extends AbstractComponent implements HttpServerTrans
     /** Rest headers that are copied to internal requests made during a rest request. */
     private final Set<String> headersToCopy;
 
-    private final boolean isContentTypeRequired;
-
-    private final DeprecationLogger deprecationLogger;
-
     public RestController(Settings settings, Set<String> headersToCopy, UnaryOperator<RestHandler> handlerWrapper,
                           NodeClient client, CircuitBreakerService circuitBreakerService) {
         super(settings);
@@ -89,8 +83,6 @@ public class RestController extends AbstractComponent implements HttpServerTrans
         this.handlerWrapper = handlerWrapper;
         this.client = client;
         this.circuitBreakerService = circuitBreakerService;
-        this.isContentTypeRequired = HttpTransportSettings.SETTING_HTTP_CONTENT_TYPE_REQUIRED.get(settings);
-        this.deprecationLogger = new DeprecationLogger(logger);
     }
 
     /**
@@ -182,7 +174,7 @@ public class RestController extends AbstractComponent implements HttpServerTrans
             assert contentLength >= 0 : "content length was negative, how is that possible?";
             final RestHandler handler = getHandler(request);
 
-            if (contentLength > 0 && hasContentTypeOrCanAutoDetect(request, handler) == false) {
+            if (contentLength > 0 && hasContentType(request, handler) == false) {
                 sendContentTypeErrorMessage(request, responseChannel);
             } else if (contentLength > 0 && handler != null && handler.supportsContentStream() &&
                 request.getXContentType() != XContentType.JSON && request.getXContentType() != XContentType.SMILE) {
@@ -266,43 +258,19 @@ public class RestController extends AbstractComponent implements HttpServerTrans
 
     /**
      * If a request contains content, this method will return {@code true} if the {@code Content-Type} header is present, matches an
-     * {@link XContentType} or the request is plain text, and content type is required. If content type is not required then this method
-     * returns true unless a content type could not be inferred from the body and the rest handler does not support plain text
+     * {@link XContentType} or the handler supports a content stream and the content type header is for newline delimited JSON,
      */
-    private boolean hasContentTypeOrCanAutoDetect(final RestRequest restRequest, final RestHandler restHandler) {
+    private boolean hasContentType(final RestRequest restRequest, final RestHandler restHandler) {
         if (restRequest.getXContentType() == null) {
-            if (restHandler != null && restHandler.supportsPlainText()) {
-                // content type of null with a handler that supports plain text gets through for now. Once we remove plain text this can
-                // be removed!
-                deprecationLogger.deprecated("Plain text request bodies are deprecated. Use request parameters or body " +
-                    "in a supported format.");
-            } else if (restHandler != null && restHandler.supportsContentStream() && restRequest.header("Content-Type") != null) {
+            if (restHandler != null && restHandler.supportsContentStream() && restRequest.header("Content-Type") != null) {
                 final String lowercaseMediaType = restRequest.header("Content-Type").toLowerCase(Locale.ROOT);
                 // we also support newline delimited JSON: http://specs.okfnlabs.org/ndjson/
                 if (lowercaseMediaType.equals("application/x-ndjson")) {
                     restRequest.setXContentType(XContentType.JSON);
-                } else if (isContentTypeRequired) {
-                    return false;
-                } else {
-                    return autoDetectXContentType(restRequest);
+                    return true;
                 }
-            } else if (isContentTypeRequired) {
-                return false;
-            } else {
-                return autoDetectXContentType(restRequest);
             }
-        }
-        return true;
-    }
-
-    private boolean autoDetectXContentType(RestRequest restRequest) {
-        deprecationLogger.deprecated("Content type detection for rest requests is deprecated. Specify the content type using " +
-            "the [Content-Type] header.");
-        XContentType xContentType = XContentFactory.xContentType(restRequest.content());
-        if (xContentType == null) {
             return false;
-        } else {
-            restRequest.setXContentType(xContentType);
         }
         return true;
     }

core/src/main/java/org/elasticsearch/rest/RestHandler.java

@@ -39,15 +39,6 @@ public interface RestHandler {
         return true;
     }
 
-    /**
-     * Indicates if a RestHandler supports plain text bodies
-     * @deprecated use request parameters or bodies that can be parsed with XContent!
-     */
-    @Deprecated
-    default boolean supportsPlainText() {
-        return false;
-    }
-
     /**
      * Indicates if the RestHandler supports content as a stream. A stream would be multiple objects delineated by
      * {@link XContent#streamSeparator()}. If a handler returns true this will affect the types of content that can be sent to

core/src/main/java/org/elasticsearch/rest/RestRequest.java

@@ -28,13 +28,10 @@ import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.collect.Tuple;
-import org.elasticsearch.common.logging.DeprecationLogger;
-import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.common.xcontent.ToXContent;
-import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.common.xcontent.XContentType;
 
@@ -54,7 +51,6 @@ import static org.elasticsearch.common.unit.TimeValue.parseTimeValue;
 
 public abstract class RestRequest implements ToXContent.Params {
 
-    private static final DeprecationLogger DEPRECATION_LOGGER = new DeprecationLogger(Loggers.getLogger(RestRequest.class));
     // tchar pattern as defined by RFC7230 section 3.2.6
     private static final Pattern TCHAR_PATTERN = Pattern.compile("[a-zA-z0-9!#$%&'*+\\-.\\^_`|~]+");
 
@@ -407,66 +403,17 @@ public abstract class RestRequest implements ToXContent.Params {
 
         String source = param("source");
         String typeParam = param("source_content_type");
-        if (source != null) {
+        if (source != null && typeParam != null) {
             BytesArray bytes = new BytesArray(source);
-            final XContentType xContentType;
-            if (typeParam != null) {
-                xContentType = parseContentType(Collections.singletonList(typeParam));
-            } else {
-                DEPRECATION_LOGGER.deprecated("Deprecated use of the [source] parameter without the [source_content_type] parameter. Use " +
-                    "the [source_content_type] parameter to specify the content type of the source such as [application/json]");
-                xContentType = XContentFactory.xContentType(bytes);
-            }
-
+            final XContentType xContentType = parseContentType(Collections.singletonList(typeParam));
             if (xContentType == null) {
-                throw new IllegalStateException("could not determine source content type");
+                throw new IllegalStateException("Unknown value for source_content_type [" + typeParam + "]");
             }
             return new Tuple<>(xContentType, bytes);
         }
         return new Tuple<>(XContentType.JSON, BytesArray.EMPTY);
     }
 
-    /**
-     * Call a consumer with the parser for the contents of this request if it has contents, otherwise with a parser for the {@code source}
-     * parameter if there is one, otherwise with {@code null}. Use {@link #contentOrSourceParamParser()} if you should throw an exception
-     * back to the user when there isn't request content. This version allows for plain text content
-     */
-    @Deprecated
-    public final void withContentOrSourceParamParserOrNullLenient(CheckedConsumer<XContentParser, IOException> withParser)
-        throws IOException {
-        if (hasContent() && xContentType.get() == null) {
-            withParser.accept(null);
-        }
-
-        Tuple<XContentType, BytesReference> tuple = contentOrSourceParam();
-        BytesReference content = tuple.v2();
-        XContentType xContentType = tuple.v1();
-        if (content.length() > 0) {
-            try (XContentParser parser = xContentType.xContent().createParser(xContentRegistry, content)) {
-                withParser.accept(parser);
-            }
-        } else {
-            withParser.accept(null);
-        }
-    }
-
-    /**
-     * Get the content of the request or the contents of the {@code source} param without the xcontent type. This is useful the request can
-     * accept non xcontent values.
-     * @deprecated we should only take xcontent
-     */
-    @Deprecated
-    public final BytesReference getContentOrSourceParamOnly() {
-        if (hasContent()) {
-            return content();
-        }
-        String source = param("source");
-        if (source != null) {
-            return new BytesArray(source);
-        }
-        return BytesArray.EMPTY;
-    }
-
     /**
      * Parses the given content type string for the media type. This method currently ignores parameters.
      */

core/src/main/java/org/elasticsearch/rest/action/search/RestClearScrollAction.java

@@ -22,7 +22,6 @@ package org.elasticsearch.rest.action.search;
 import org.elasticsearch.action.search.ClearScrollRequest;
 import org.elasticsearch.client.node.NodeClient;
 import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.rest.BaseRestHandler;
@@ -48,15 +47,8 @@ public class RestClearScrollAction extends BaseRestHandler {
         String scrollIds = request.param("scroll_id");
         ClearScrollRequest clearRequest = new ClearScrollRequest();
         clearRequest.setScrollIds(Arrays.asList(splitScrollIds(scrollIds)));
-        request.withContentOrSourceParamParserOrNullLenient((xContentParser -> {
-            if (xContentParser == null) {
-                if (request.hasContent()) {
-                    // TODO: why do we accept this plain text value? maybe we can just use the scroll params?
-                    BytesReference body = request.content();
-                    String bodyScrollIds = body.utf8ToString();
-                    clearRequest.setScrollIds(Arrays.asList(splitScrollIds(bodyScrollIds)));
-                }
-            } else {
+        request.withContentOrSourceParamParserOrNull((xContentParser -> {
+            if (xContentParser != null) {
                 // NOTE: if rest request with xcontent body has request parameters, these parameters does not override xcontent value
                 clearRequest.setScrollIds(null);
                 try {
@@ -70,11 +62,6 @@ public class RestClearScrollAction extends BaseRestHandler {
         return channel -> client.clearScroll(clearRequest, new RestStatusToXContentListener<>(channel));
     }
 
-    @Override
-    public boolean supportsPlainText() {
-        return true;
-    }
-
     private static String[] splitScrollIds(String scrollIds) {
         if (scrollIds == null) {
             return Strings.EMPTY_ARRAY;

core/src/main/java/org/elasticsearch/rest/action/search/RestSearchScrollAction.java

@@ -21,7 +21,6 @@ package org.elasticsearch.rest.action.search;
 
 import org.elasticsearch.action.search.SearchScrollRequest;
 import org.elasticsearch.client.node.NodeClient;
-import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentParser;
@@ -58,32 +57,17 @@ public class RestSearchScrollAction extends BaseRestHandler {
         }
 
         request.withContentOrSourceParamParserOrNull(xContentParser -> {
-            if (xContentParser == null) {
-                if (request.hasContent()) {
-                    // TODO: why do we accept this plain text value? maybe we can just use the scroll params?
-                    BytesReference body = request.getContentOrSourceParamOnly();
-                    if (scrollId == null) {
-                        String bodyScrollId = body.utf8ToString();
-                        searchScrollRequest.scrollId(bodyScrollId);
-                    }
-                }
-            } else {
+            if (xContentParser != null) {
                 // NOTE: if rest request with xcontent body has request parameters, these parameters override xcontent values
                 try {
                     buildFromContent(xContentParser, searchScrollRequest);
                 } catch (IOException e) {
                     throw new IllegalArgumentException("Failed to parse request body", e);
                 }
-            }
-        });
+            }});
         return channel -> client.searchScroll(searchScrollRequest, new RestStatusToXContentListener<>(channel));
     }
 
-    @Override
-    public boolean supportsPlainText() {
-        return true;
-    }
-
     public static void buildFromContent(XContentParser parser, SearchScrollRequest searchScrollRequest) throws IOException {
         if (parser.nextToken() != XContentParser.Token.START_OBJECT) {
             throw new IllegalArgumentException("Malformed content, must start with an object");

core/src/main/java/org/elasticsearch/tasks/TaskResultsService.java

@@ -43,6 +43,7 @@ import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.ResourceAlreadyExistsException;
+import org.elasticsearch.common.xcontent.XContentType;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -82,7 +83,7 @@ public class TaskResultsService extends AbstractComponent {
             CreateIndexRequest createIndexRequest = new CreateIndexRequest();
             createIndexRequest.settings(taskResultIndexSettings());
             createIndexRequest.index(TASK_INDEX);
-            createIndexRequest.mapping(TASK_TYPE, taskResultIndexMapping());
+            createIndexRequest.mapping(TASK_TYPE, taskResultIndexMapping(), XContentType.JSON);
             createIndexRequest.cause("auto(task api)");
 
             createIndexAction.execute(null, createIndexRequest, new ActionListener<CreateIndexResponse>() {
@@ -110,7 +111,8 @@ public class TaskResultsService extends AbstractComponent {
             IndexMetaData metaData = state.getMetaData().index(TASK_INDEX);
             if (metaData.getMappings().containsKey(TASK_TYPE) == false) {
                 // The index already exists but doesn't have our mapping
-                client.admin().indices().preparePutMapping(TASK_INDEX).setType(TASK_TYPE).setSource(taskResultIndexMapping())
+                client.admin().indices().preparePutMapping(TASK_INDEX).setType(TASK_TYPE)
+                    .setSource(taskResultIndexMapping(), XContentType.JSON)
                     .execute(new ActionListener<PutMappingResponse>() {
                                  @Override
                                  public void onResponse(PutMappingResponse putMappingResponse) {

core/src/test/java/org/elasticsearch/action/admin/indices/get/GetIndexIT.java

@@ -25,6 +25,7 @@ import org.elasticsearch.cluster.metadata.AliasMetaData;
 import org.elasticsearch.cluster.metadata.MappingMetaData;
 import org.elasticsearch.common.collect.ImmutableOpenMap;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.test.ESIntegTestCase;
 
@@ -48,7 +49,7 @@ import static org.hamcrest.Matchers.notNullValue;
 public class GetIndexIT extends ESIntegTestCase {
     @Override
     protected void setupSuiteScopeCluster() throws Exception {
-        assertAcked(prepareCreate("idx").addAlias(new Alias("alias_idx")).addMapping("type1", "{\"type1\":{}}")
+        assertAcked(prepareCreate("idx").addAlias(new Alias("alias_idx")).addMapping("type1", "{\"type1\":{}}", XContentType.JSON)
                 .setSettings(Settings.builder().put("number_of_shards", 1)).get());
         ensureSearchable("idx");
         createIndex("empty_idx");

core/src/test/java/org/elasticsearch/action/bulk/BulkRequestTests.java

@@ -243,7 +243,7 @@ public class BulkRequestTests extends ESTestCase {
         }
 
         BulkRequest bulkRequest = new BulkRequest();
-        bulkRequest.add(data, null, null);
+        bulkRequest.add(data, null, null, xContentType);
         assertEquals(1, bulkRequest.requests().size());
         DocWriteRequest docWriteRequest = bulkRequest.requests().get(0);
         assertEquals(DocWriteRequest.OpType.INDEX, docWriteRequest.opType());

core/src/test/java/org/elasticsearch/action/bulk/BulkWithUpdatesIT.java

@@ -455,8 +455,8 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
      */
     public void testBulkUpdateDocAsUpsertWithParent() throws Exception {
         client().admin().indices().prepareCreate("test")
-                .addMapping("parent", "{\"parent\":{}}")
-                .addMapping("child", "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}")
+                .addMapping("parent", "{\"parent\":{}}", XContentType.JSON)
+                .addMapping("child", "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}", XContentType.JSON)
                 .execute().actionGet();
         ensureGreen();
 
@@ -519,8 +519,8 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
      */
     public void testBulkUpdateUpsertWithParent() throws Exception {
         assertAcked(prepareCreate("test")
-                .addMapping("parent", "{\"parent\":{}}")
-                .addMapping("child", "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}"));
+                .addMapping("parent", "{\"parent\":{}}", XContentType.JSON)
+                .addMapping("child", "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}", XContentType.JSON));
         ensureGreen();
 
         BulkRequestBuilder builder = client().prepareBulk();
@@ -603,8 +603,8 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
      * Test for https://github.com/elastic/elasticsearch/issues/8365
      */
     public void testBulkUpdateChildMissingParentRouting() throws Exception {
-        assertAcked(prepareCreate("test").addMapping("parent", "{\"parent\":{}}").addMapping("child",
-                "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}"));
+        assertAcked(prepareCreate("test").addMapping("parent", "{\"parent\":{}}", XContentType.JSON)
+            .addMapping("child", "{\"child\": {\"_parent\": {\"type\": \"parent\"}}}", XContentType.JSON));
         ensureGreen();
 
         BulkRequestBuilder builder = client().prepareBulk();

core/src/test/java/org/elasticsearch/action/index/IndexRequestTests.java

@@ -209,11 +209,11 @@ public class IndexRequestTests extends ESTestCase {
         IndexRequest request = new IndexRequest("index", "type");
 
         String source = "{\"name\":\"value\"}";
-        request.source(source);
+        request.source(source, XContentType.JSON);
         assertEquals("index {[index][type][null], source[" + source + "]}", request.toString());
 
         source = "{\"name\":\"" + randomUnicodeOfLength(IndexRequest.MAX_SOURCE_LENGTH_IN_TOSTRING) + "\"}";
-        request.source(source);
+        request.source(source, XContentType.JSON);
         int actualBytes = source.getBytes("UTF-8").length;
         assertEquals("index {[index][type][null], source[n/a, actual length: [" + new ByteSizeValue(actualBytes).toString() +
                 "], max length: " + new ByteSizeValue(IndexRequest.MAX_SOURCE_LENGTH_IN_TOSTRING).toString() + "]}", request.toString());

core/src/test/java/org/elasticsearch/cluster/SpecificMasterNodesIT.java

@@ -22,6 +22,7 @@ package org.elasticsearch.cluster;
 import org.apache.lucene.search.join.ScoreMode;
 import org.elasticsearch.cluster.metadata.MappingMetaData;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.discovery.MasterNotDiscoveredException;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.node.Node;
@@ -129,7 +130,8 @@ public class SpecificMasterNodesIT extends ESIntegTestCase {
         logger.info("--> start data node / non master node");
         internalCluster().startNode(Settings.builder().put(Node.NODE_DATA_SETTING.getKey(), true).put(Node.NODE_MASTER_SETTING.getKey(), false));
 
-        assertAcked(prepareCreate("test").addMapping("type1", "{\"type1\" : {\"properties\" : {\"table_a\" : { \"type\" : \"nested\", \"properties\" : {\"field_a\" : { \"type\" : \"keyword\" },\"field_b\" :{ \"type\" : \"keyword\" }}}}}}"));
+        assertAcked(prepareCreate("test").addMapping("type1", "{\"type1\" : {\"properties\" : {\"table_a\" : { \"type\" : \"nested\", " +
+            "\"properties\" : {\"field_a\" : { \"type\" : \"keyword\" },\"field_b\" :{ \"type\" : \"keyword\" }}}}}}", XContentType.JSON));
         client().admin().indices().prepareAliases().addAlias("test", "a_test", QueryBuilders.nestedQuery("table_a", QueryBuilders.termQuery("table_a.field_b", "y"), ScoreMode.Avg)).get();
     }
 }

core/src/test/java/org/elasticsearch/cluster/metadata/MetaDataMappingServiceTests.java

@@ -23,6 +23,7 @@ import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
@@ -73,8 +74,8 @@ public class MetaDataMappingServiceTests extends ESSingleNodeTestCase {
     public void testParentIsAString() throws Exception {
         // Shouldn't be able the add the _parent field pointing to an already existing type, which isn't a parent type
         Exception e = expectThrows(MapperParsingException.class, () -> client().admin().indices().prepareCreate("test")
-                .addMapping("parent", "{\"properties\":{}}")
-                .addMapping("child", "{\"_parent\": \"parent\",\"properties\":{}}")
+                .addMapping("parent", "{\"properties\":{}}", XContentType.JSON)
+                .addMapping("child", "{\"_parent\": \"parent\",\"properties\":{}}", XContentType.JSON)
                 .get());
         assertEquals("Failed to parse mapping [child]: [_parent] must be an object containing [type]", e.getMessage());
     }

core/src/test/java/org/elasticsearch/gateway/GatewayIndexStateIT.java

@@ -38,6 +38,7 @@ import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.discovery.zen.ElectMasterService;
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.env.NodeEnvironment;
@@ -459,7 +460,7 @@ public class GatewayIndexStateIT extends ESIntegTestCase {
                 "        }\n" +
                 "      }\n" +
                 "    }\n" +
-                "  }}").get();
+                "  }}", XContentType.JSON).get();
         logger.info("--> indexing a simple document");
         client().prepareIndex("test", "type1", "1").setSource("field1", "value one").setRefreshPolicy(IMMEDIATE).get();
         logger.info("--> waiting for green status");

core/src/test/java/org/elasticsearch/gateway/RecoveryFromGatewayIT.java

@@ -29,6 +29,7 @@ import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.service.ClusterService;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.index.Index;
@@ -86,7 +87,7 @@ public class RecoveryFromGatewayIT extends ESIntegTestCase {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type1")
             .startObject("properties").startObject("appAccountIds").field("type", "text").endObject().endObject()
             .endObject().endObject().string();
-        assertAcked(prepareCreate("test").addMapping("type1", mapping));
+        assertAcked(prepareCreate("test").addMapping("type1", mapping, XContentType.JSON));
 
         client().prepareIndex("test", "type1", "10990239").setSource(jsonBuilder().startObject()
             .startArray("appAccountIds").value(14).value(179).endArray().endObject()).execute().actionGet();
@@ -160,7 +161,7 @@ public class RecoveryFromGatewayIT extends ESIntegTestCase {
         assertAcked(prepareCreate("test").setSettings(
             SETTING_NUMBER_OF_SHARDS, numberOfShards(),
             SETTING_NUMBER_OF_REPLICAS, randomIntBetween(0, 1)
-        ).addMapping("type1", mapping));
+        ).addMapping("type1", mapping, XContentType.JSON));
 
         int value1Docs;
         int value2Docs;

core/src/test/java/org/elasticsearch/get/GetActionIT.java

@@ -253,8 +253,8 @@ public class GetActionIT extends ESIntegTestCase {
                 .endObject()
                 .endObject().endObject().string();
         assertAcked(prepareCreate("test")
-                .addMapping("type1", mapping1)
-                .addMapping("type2", mapping2)
+                .addMapping("type1", mapping1, XContentType.JSON)
+                .addMapping("type2", mapping2, XContentType.JSON)
                 .setSettings(Settings.builder().put("index.refresh_interval", -1)));
         ensureGreen();
 

core/src/test/java/org/elasticsearch/index/mapper/CamelCaseFieldNameTests.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.index.mapper;
 
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.ParsedDocument;
@@ -31,7 +32,7 @@ public class CamelCaseFieldNameTests extends ESSingleNodeTestCase {
                 .endObject().endObject().string();
 
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping, XContentType.JSON).get();
         DocumentMapper documentMapper = index.mapperService().documentMapper("type");
 
         ParsedDocument doc = documentMapper.parse("test", "type", "1", XContentFactory.jsonBuilder().startObject()
@@ -39,7 +40,8 @@ public class CamelCaseFieldNameTests extends ESSingleNodeTestCase {
                 .endObject().bytes());
 
         assertNotNull(doc.dynamicMappingsUpdate());
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(doc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("type")
+            .setSource(doc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
 
         documentMapper = index.mapperService().documentMapper("type");
         assertNotNull(documentMapper.mappers().getMapper("thisIsCamelCase"));

core/src/test/java/org/elasticsearch/index/mapper/CopyToMapperIntegrationIT.java

@@ -22,6 +22,7 @@ package org.elasticsearch.index.mapper;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.search.aggregations.AggregationBuilders;
 import org.elasticsearch.search.aggregations.Aggregator.SubAggCollectionMode;
@@ -76,7 +77,7 @@ public class CopyToMapperIntegrationIT extends ESIntegTestCase {
             .endObject().endObject().endObject().string();
         assertAcked(
             client().admin().indices().prepareCreate("test-idx")
-                .addMapping("doc", mapping)
+                .addMapping("doc", mapping, XContentType.JSON)
         );
         client().prepareIndex("test-idx", "doc", "1")
             .setSource("foo", "bar")

core/src/test/java/org/elasticsearch/index/mapper/CopyToMapperTests.java

@@ -26,6 +26,7 @@ import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.json.JsonXContent;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.ParseContext.Document;
@@ -66,7 +67,7 @@ public class CopyToMapperTests extends ESSingleNodeTestCase {
                 .endObject().endObject().endObject().string();
 
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type1").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type1").setSource(mapping, XContentType.JSON).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("type1");
         FieldMapper fieldMapper = docMapper.mappers().getMapper("copy_test");
 
@@ -114,7 +115,8 @@ public class CopyToMapperTests extends ESSingleNodeTestCase {
         assertThat(doc.getFields("new_field")[0].numericValue().intValue(), equalTo(42));
 
         assertNotNull(parsedDoc.dynamicMappingsUpdate());
-        client().admin().indices().preparePutMapping("test").setType("type1").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("type1")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
 
         docMapper = index.mapperService().documentMapper("type1");
         fieldMapper = docMapper.mappers().getMapper("new_field");

core/src/test/java/org/elasticsearch/index/mapper/DocumentParserTests.java

@@ -38,6 +38,7 @@ import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.lucene.all.AllField;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.ParseContext.Document;
 import org.elasticsearch.plugins.Plugin;
@@ -1273,7 +1274,7 @@ public class DocumentParserTests extends ESSingleNodeTestCase {
                 .endObject().endArray()
                 .endObject().bytes();
 
-        client().prepareIndex("idx", "type").setSource(bytes).get();
+        client().prepareIndex("idx", "type").setSource(bytes, XContentType.JSON).get();
 
         bytes = XContentFactory.jsonBuilder().startObject().startArray("top.")
                 .startObject().startArray("foo.")
@@ -1288,7 +1289,7 @@ public class DocumentParserTests extends ESSingleNodeTestCase {
                 .endObject().bytes();
 
         try {
-            client().prepareIndex("idx", "type").setSource(bytes).get();
+            client().prepareIndex("idx", "type").setSource(bytes, XContentType.JSON).get();
             fail("should have failed to dynamically introduce a double-dot field");
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(),

core/src/test/java/org/elasticsearch/index/mapper/DoubleIndexingDocTests.java

@@ -26,6 +26,7 @@ import org.apache.lucene.search.TopDocs;
 import org.apache.lucene.store.Directory;
 import org.elasticsearch.common.lucene.Lucene;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.ParsedDocument;
@@ -43,7 +44,7 @@ public class DoubleIndexingDocTests extends ESSingleNodeTestCase {
                 .startObject("properties").endObject()
                 .endObject().endObject().string();
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping, XContentType.JSON).get();
         DocumentMapper mapper = index.mapperService().documentMapper("type");
         QueryShardContext context = index.newQueryShardContext(0, null, () -> 0L);
 
@@ -57,7 +58,8 @@ public class DoubleIndexingDocTests extends ESSingleNodeTestCase {
                 .endObject()
                 .bytes());
         assertNotNull(doc.dynamicMappingsUpdate());
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(doc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("type")
+            .setSource(doc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
         mapper = index.mapperService().documentMapper("type");
 
         writer.addDocument(doc.rootDoc());

core/src/test/java/org/elasticsearch/index/mapper/DynamicMappingTests.java

@@ -29,6 +29,7 @@ import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.json.JsonXContent;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.BooleanFieldMapper.BooleanFieldType;
@@ -599,7 +600,7 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject().endObject().string();
 
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping, XContentType.JSON).get();
         DocumentMapper defaultMapper = index.mapperService().documentMapper("type");
 
         ParsedDocument doc = defaultMapper.parse("test", "type", "1", XContentFactory.jsonBuilder()
@@ -609,7 +610,8 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject()
                 .bytes());
         assertNotNull(doc.dynamicMappingsUpdate());
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(doc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("type")
+            .setSource(doc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
 
         defaultMapper = index.mapperService().documentMapper("type");
         FieldMapper mapper = defaultMapper.mappers().smartNameFieldMapper("s_long");
@@ -624,7 +626,7 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject().endObject().string();
 
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping, XContentType.JSON).get();
         DocumentMapper defaultMapper = index.mapperService().documentMapper("type");
 
         ParsedDocument doc = defaultMapper.parse("test", "type", "1", XContentFactory.jsonBuilder()
@@ -634,7 +636,8 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject()
                 .bytes());
         assertNotNull(doc.dynamicMappingsUpdate());
-        assertAcked(client().admin().indices().preparePutMapping("test").setType("type").setSource(doc.dynamicMappingsUpdate().toString()).get());
+        assertAcked(client().admin().indices().preparePutMapping("test").setType("type")
+            .setSource(doc.dynamicMappingsUpdate().toString(), XContentType.JSON).get());
 
         defaultMapper = index.mapperService().documentMapper("type");
         FieldMapper mapper = defaultMapper.mappers().smartNameFieldMapper("s_long");
@@ -671,7 +674,7 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject().endObject().string();
 
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("type").setSource(mapping, XContentType.JSON).get();
         DocumentMapper defaultMapper = index.mapperService().documentMapper("type");
 
         ParsedDocument doc = defaultMapper.parse("test", "type", "1", XContentFactory.jsonBuilder()
@@ -682,7 +685,8 @@ public class DynamicMappingTests extends ESSingleNodeTestCase {
                 .endObject()
                 .bytes());
         assertNotNull(doc.dynamicMappingsUpdate());
-        assertAcked(client().admin().indices().preparePutMapping("test").setType("type").setSource(doc.dynamicMappingsUpdate().toString()).get());
+        assertAcked(client().admin().indices().preparePutMapping("test").setType("type")
+            .setSource(doc.dynamicMappingsUpdate().toString(), XContentType.JSON).get());
 
         defaultMapper = index.mapperService().documentMapper("type");
 

core/src/test/java/org/elasticsearch/index/mapper/DynamicTemplatesTests.java

@@ -24,6 +24,7 @@ import org.apache.lucene.index.IndexableField;
 import org.apache.lucene.util.BytesRef;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.json.JsonXContent;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentFieldMappers;
@@ -46,12 +47,13 @@ public class DynamicTemplatesTests extends ESSingleNodeTestCase {
                 .startObject("mapping").field("index", false).endObject()
                 .endObject().endObject().endArray().endObject().endObject();
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(builder.string()).get();
+        client().admin().indices().preparePutMapping("test").setType("person").setSource(builder).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("person");
         builder = JsonXContent.contentBuilder();
         builder.startObject().field("s", "hello").field("l", 1).endObject();
         ParsedDocument parsedDoc = docMapper.parse("test", "person", "1", builder.bytes());
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("person")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
 
         docMapper = index.mapperService().documentMapper("person");
         DocumentFieldMappers mappers = docMapper.mappers();
@@ -68,11 +70,12 @@ public class DynamicTemplatesTests extends ESSingleNodeTestCase {
     public void testSimple() throws Exception {
         String mapping = copyToStringFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/simple/test-mapping.json");
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping, XContentType.JSON).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("person");
         byte[] json = copyToBytesFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/simple/test-data.json");
         ParsedDocument parsedDoc = docMapper.parse("test", "person", "1", new BytesArray(json));
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("person")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
         docMapper = index.mapperService().documentMapper("person");
         Document doc = parsedDoc.rootDoc();
 
@@ -125,11 +128,12 @@ public class DynamicTemplatesTests extends ESSingleNodeTestCase {
     public void testSimpleWithXContentTraverse() throws Exception {
         String mapping = copyToStringFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/simple/test-mapping.json");
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping, XContentType.JSON).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("person");
         byte[] json = copyToBytesFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/simple/test-data.json");
         ParsedDocument parsedDoc = docMapper.parse("test", "person", "1", new BytesArray(json));
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("person")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
         docMapper = index.mapperService().documentMapper("person");
         Document doc = parsedDoc.rootDoc();
 

core/src/test/java/org/elasticsearch/index/mapper/GenericStoreDynamicTemplateTests.java

@@ -21,6 +21,7 @@ package org.elasticsearch.index.mapper;
 
 import org.apache.lucene.index.IndexableField;
 import org.elasticsearch.common.bytes.BytesArray;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.FieldMapper;
@@ -36,11 +37,12 @@ public class GenericStoreDynamicTemplateTests extends ESSingleNodeTestCase {
     public void testSimple() throws Exception {
         String mapping = copyToStringFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/genericstore/test-mapping.json");
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping, XContentType.JSON).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("person");
         byte[] json = copyToBytesFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/genericstore/test-data.json");
         ParsedDocument parsedDoc = docMapper.parse("test", "person", "1", new BytesArray(json));
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("person")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
         docMapper = index.mapperService().documentMapper("person");
         Document doc = parsedDoc.rootDoc();
 

core/src/test/java/org/elasticsearch/index/mapper/GeoPointFieldMapperTests.java

@@ -25,6 +25,7 @@ import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.geo.GeoPoint;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.test.ESSingleNodeTestCase;
 import org.elasticsearch.test.InternalSettingsPlugin;
@@ -227,7 +228,7 @@ public class GeoPointFieldMapperTests extends ESSingleNodeTestCase {
             .endObject()
             .endObject().endObject().endObject().endObject().string();
         CreateIndexRequestBuilder mappingRequest = client().admin().indices().prepareCreate("test")
-            .addMapping("pin", mapping);
+            .addMapping("pin", mapping, XContentType.JSON);
         mappingRequest.execute().actionGet();
 
         // create index and add random test points

core/src/test/java/org/elasticsearch/index/mapper/MapperServiceTests.java

@@ -241,7 +241,7 @@ public class MapperServiceTests extends ESSingleNodeTestCase {
         // partitioned index must have routing
          IllegalArgumentException noRoutingException = expectThrows(IllegalArgumentException.class, () -> {
             client().admin().indices().prepareCreate("test-index")
-                    .addMapping("type", "{\"type\":{}}")
+                    .addMapping("type", "{\"type\":{}}", XContentType.JSON)
                     .setSettings(Settings.builder()
                         .put("index.number_of_shards", 4)
                         .put("index.routing_partition_size", 2))
@@ -252,8 +252,9 @@ public class MapperServiceTests extends ESSingleNodeTestCase {
         // partitioned index cannot have parent/child relationships
         IllegalArgumentException parentException = expectThrows(IllegalArgumentException.class, () -> {
             client().admin().indices().prepareCreate("test-index")
-                    .addMapping("parent", "{\"parent\":{\"_routing\":{\"required\":true}}}")
-                    .addMapping("child", "{\"child\": {\"_routing\":{\"required\":true}, \"_parent\": {\"type\": \"parent\"}}}")
+                    .addMapping("parent", "{\"parent\":{\"_routing\":{\"required\":true}}}", XContentType.JSON)
+                    .addMapping("child", "{\"child\": {\"_routing\":{\"required\":true}, \"_parent\": {\"type\": \"parent\"}}}",
+                        XContentType.JSON)
                     .setSettings(Settings.builder()
                         .put("index.number_of_shards", 4)
                         .put("index.routing_partition_size", 2))
@@ -263,7 +264,7 @@ public class MapperServiceTests extends ESSingleNodeTestCase {
 
         // valid partitioned index
         assertTrue(client().admin().indices().prepareCreate("test-index")
-            .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}")
+            .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}", XContentType.JSON)
             .setSettings(Settings.builder()
                 .put("index.number_of_shards", 4)
                 .put("index.routing_partition_size", 2))

core/src/test/java/org/elasticsearch/index/mapper/PathMatchDynamicTemplateTests.java

@@ -21,6 +21,7 @@ package org.elasticsearch.index.mapper;
 
 import org.apache.lucene.index.IndexableField;
 import org.elasticsearch.common.bytes.BytesArray;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.FieldMapper;
@@ -36,11 +37,12 @@ public class PathMatchDynamicTemplateTests extends ESSingleNodeTestCase {
     public void testSimple() throws Exception {
         String mapping = copyToStringFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/pathmatch/test-mapping.json");
         IndexService index = createIndex("test");
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping).get();
+        client().admin().indices().preparePutMapping("test").setType("person").setSource(mapping, XContentType.JSON).get();
         DocumentMapper docMapper = index.mapperService().documentMapper("person");
         byte[] json = copyToBytesFromClasspath("/org/elasticsearch/index/mapper/dynamictemplate/pathmatch/test-data.json");
         ParsedDocument parsedDoc = docMapper.parse("test", "person", "1", new BytesArray(json));
-        client().admin().indices().preparePutMapping("test").setType("person").setSource(parsedDoc.dynamicMappingsUpdate().toString()).get();
+        client().admin().indices().preparePutMapping("test").setType("person")
+            .setSource(parsedDoc.dynamicMappingsUpdate().toString(), XContentType.JSON).get();
         docMapper = index.mapperService().documentMapper("person");
         Document doc = parsedDoc.rootDoc();
 

core/src/test/java/org/elasticsearch/index/mapper/UpdateMappingOnClusterIT.java

@@ -23,6 +23,7 @@ import org.elasticsearch.Version;
 import org.elasticsearch.action.admin.indices.mapping.get.GetMappingsResponse;
 import org.elasticsearch.client.Client;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.test.ESIntegTestCase;
 import org.elasticsearch.test.InternalSettingsPlugin;
@@ -45,11 +46,11 @@ public class UpdateMappingOnClusterIT extends ESIntegTestCase {
     }
 
     protected void testConflict(String mapping, String mappingUpdate, Version idxVersion, String... errorMessages) throws InterruptedException {
-        assertAcked(prepareCreate(INDEX).setSource(mapping).setSettings("index.version.created", idxVersion.id));
+        assertAcked(prepareCreate(INDEX).setSource(mapping, XContentType.JSON).setSettings("index.version.created", idxVersion.id));
         ensureGreen(INDEX);
         GetMappingsResponse mappingsBeforeUpdateResponse = client().admin().indices().prepareGetMappings(INDEX).addTypes(TYPE).get();
         try {
-            client().admin().indices().preparePutMapping(INDEX).setType(TYPE).setSource(mappingUpdate).get();
+            client().admin().indices().preparePutMapping(INDEX).setType(TYPE).setSource(mappingUpdate, XContentType.JSON).get();
             fail();
         } catch (IllegalArgumentException e) {
             for (String errorMessage : errorMessages) {

core/src/test/java/org/elasticsearch/index/replication/RecoveryDuringReplicationTests.java

@@ -32,6 +32,7 @@ import org.elasticsearch.index.engine.Engine;
 import org.elasticsearch.index.engine.EngineConfig;
 import org.elasticsearch.index.engine.EngineFactory;
 import org.elasticsearch.index.engine.InternalEngineTests;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.shard.IndexShard;
 import org.elasticsearch.index.store.Store;
 import org.elasticsearch.index.translog.Translog;
@@ -164,7 +165,8 @@ public class RecoveryDuringReplicationTests extends ESIndexLevelReplicationTestC
                 final int rollbackDocs = randomIntBetween(1, 5);
                 logger.info("--> indexing {} rollback docs", rollbackDocs);
                 for (int i = 0; i < rollbackDocs; i++) {
-                    final IndexRequest indexRequest = new IndexRequest(index.getName(), "type", "rollback_" + i).source("{}");
+                    final IndexRequest indexRequest = new IndexRequest(index.getName(), "type", "rollback_" + i)
+                        .source("{}", XContentType.JSON);
                     indexOnPrimary(indexRequest, oldPrimary);
                     indexOnReplica(indexRequest, replica);
                 }
@@ -266,7 +268,7 @@ public class RecoveryDuringReplicationTests extends ESIndexLevelReplicationTestC
                 final String id = "pending_" + i;
                 threadPool.generic().submit(() -> {
                     try {
-                        shards.index(new IndexRequest(index.getName(), "type", id).source("{}"));
+                        shards.index(new IndexRequest(index.getName(), "type", id).source("{}", XContentType.JSON));
                     } catch (Exception e) {
                         throw new AssertionError(e);
                     } finally {

core/src/test/java/org/elasticsearch/indices/mapping/ConcurrentDynamicTemplateIT.java

@@ -22,6 +22,7 @@ package org.elasticsearch.indices.mapping;
 
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.index.IndexResponse;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.test.ESIntegTestCase;
 
@@ -53,7 +54,7 @@ public class ConcurrentDynamicTemplateIT extends ESIntegTestCase {
         for (int i = 0; i < iters; i++) {
             cluster().wipeIndices("test");
             assertAcked(prepareCreate("test")
-                    .addMapping(mappingType, mapping));
+                    .addMapping(mappingType, mapping, XContentType.JSON));
             int numDocs = scaledRandomIntBetween(10, 100);
             final CountDownLatch latch = new CountDownLatch(numDocs);
             final List<Throwable> throwable = new CopyOnWriteArrayList<>();

core/src/test/java/org/elasticsearch/indices/mapping/UpdateMappingIntegrationIT.java

@@ -29,6 +29,7 @@ import org.elasticsearch.cluster.metadata.MappingMetaData;
 import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.collect.ImmutableOpenMap;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.json.JsonXContent;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.MapperService;
@@ -102,12 +103,12 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
                         Settings.builder()
                                 .put("index.number_of_shards", 1)
                                 .put("index.number_of_replicas", 0)
-                ).addMapping("doc", "{\"doc\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}")
+                ).addMapping("doc", "{\"doc\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}", XContentType.JSON)
                 .execute().actionGet();
         client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForGreenStatus().execute().actionGet();
 
         PutMappingResponse putMappingResponse = client().admin().indices().preparePutMapping("test").setType("doc")
-                .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}")
+                .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}", XContentType.JSON)
                 .execute().actionGet();
 
         assertThat(putMappingResponse.isAcknowledged(), equalTo(true));
@@ -127,7 +128,7 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
         client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForGreenStatus().execute().actionGet();
 
         PutMappingResponse putMappingResponse = client().admin().indices().preparePutMapping("test").setType("doc")
-                .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}")
+                .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}", XContentType.JSON)
                 .execute().actionGet();
 
         assertThat(putMappingResponse.isAcknowledged(), equalTo(true));
@@ -143,13 +144,13 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
                         Settings.builder()
                                 .put("index.number_of_shards", 2)
                                 .put("index.number_of_replicas", 0)
-                ).addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}")
+                ).addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}", XContentType.JSON)
                 .execute().actionGet();
         client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForGreenStatus().execute().actionGet();
 
         try {
             client().admin().indices().preparePutMapping("test").setType("type")
-                    .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"integer\"}}}}").execute().actionGet();
+                    .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"integer\"}}}}", XContentType.JSON).execute().actionGet();
             fail("Expected MergeMappingException");
         } catch (IllegalArgumentException e) {
             assertThat(e.getMessage(), containsString("mapper [body] of different type, current_type [text], merged_type [integer]"));
@@ -158,11 +159,11 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
 
     public void testUpdateMappingWithNormsConflicts() throws Exception {
         client().admin().indices().prepareCreate("test")
-                .addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\", \"norms\": false }}}}")
+                .addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\", \"norms\": false }}}}", XContentType.JSON)
                 .execute().actionGet();
         try {
             client().admin().indices().preparePutMapping("test").setType("type")
-                    .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"text\", \"norms\": true }}}}").execute()
+                    .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"text\", \"norms\": true }}}}", XContentType.JSON).execute()
                     .actionGet();
             fail("Expected MergeMappingException");
         } catch (IllegalArgumentException e) {
@@ -179,12 +180,12 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
                         Settings.builder()
                                 .put("index.number_of_shards", 2)
                                 .put("index.number_of_replicas", 0)
-                ).addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}")
+                ).addMapping("type", "{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}", XContentType.JSON)
                 .execute().actionGet();
         client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForGreenStatus().execute().actionGet();
 
         PutMappingResponse putMappingResponse = client().admin().indices().preparePutMapping("test").setType("type")
-                .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}")
+                .setSource("{\"type\":{\"properties\":{\"body\":{\"type\":\"text\"}}}}", XContentType.JSON)
                 .execute().actionGet();
 
         //no changes, we return
@@ -321,7 +322,8 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
         for (String block : Arrays.asList(SETTING_BLOCKS_READ, SETTING_BLOCKS_WRITE)) {
             try {
                 enableIndexBlock("test", block);
-                assertAcked(client().admin().indices().preparePutMapping("test").setType("doc").setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}"));
+                assertAcked(client().admin().indices().preparePutMapping("test").setType("doc")
+                    .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}", XContentType.JSON));
             } finally {
                 disableIndexBlock("test", block);
             }
@@ -330,7 +332,8 @@ public class UpdateMappingIntegrationIT extends ESIntegTestCase {
         for (String block : Arrays.asList(SETTING_READ_ONLY, SETTING_BLOCKS_METADATA)) {
             try {
                 enableIndexBlock("test", block);
-                assertBlocked(client().admin().indices().preparePutMapping("test").setType("doc").setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}"));
+                assertBlocked(client().admin().indices().preparePutMapping("test").setType("doc")
+                    .setSource("{\"properties\":{\"date\":{\"type\":\"integer\"}}}", XContentType.JSON));
             } finally {
                 disableIndexBlock("test", block);
             }

core/src/test/java/org/elasticsearch/indices/memory/breaker/RandomExceptionCircuitBreakerIT.java

@@ -35,6 +35,7 @@ import org.elasticsearch.common.settings.Setting.Property;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.MockEngineFactoryPlugin;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.indices.IndicesService;
@@ -126,7 +127,7 @@ public class RandomExceptionCircuitBreakerIT extends ESIntegTestCase {
         logger.info("creating index: [test] using settings: [{}]", settings.build().getAsMap());
         CreateIndexResponse response = client().admin().indices().prepareCreate("test")
                 .setSettings(settings)
-                .addMapping("type", mapping).execute().actionGet();
+                .addMapping("type", mapping, XContentType.JSON).execute().actionGet();
         final int numDocs;
         if (response.isShardsAcked() == false) {
             /* some seeds just won't let you create the index at all and we enter a ping-pong mode

core/src/test/java/org/elasticsearch/indices/state/OpenCloseIndexIT.java

@@ -31,6 +31,7 @@ import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.client.Client;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.test.ESIntegTestCase;
@@ -315,7 +316,7 @@ public class OpenCloseIndexIT extends ESIntegTestCase {
                 .endObject().string();
 
         assertAcked(client().admin().indices().prepareCreate("test")
-                .addMapping("type", mapping));
+                .addMapping("type", mapping, XContentType.JSON));
         ensureGreen();
         int docs = between(10, 100);
         IndexRequestBuilder[] builder = new IndexRequestBuilder[docs];

core/src/test/java/org/elasticsearch/indices/stats/IndexStatsIT.java

@@ -784,7 +784,7 @@ public class IndexStatsIT extends ESIntegTestCase {
         assertAcked(prepareCreate("test1")
                 .addMapping(
                         "bar",
-                        "{ \"properties\": { \"bar\": { \"type\": \"text\", \"fields\": { \"completion\": { \"type\": \"completion\" }}},\"baz\": { \"type\": \"text\", \"fields\": { \"completion\": { \"type\": \"completion\" }}}}}"));
+                        "{ \"properties\": { \"bar\": { \"type\": \"text\", \"fields\": { \"completion\": { \"type\": \"completion\" }}},\"baz\": { \"type\": \"text\", \"fields\": { \"completion\": { \"type\": \"completion\" }}}}}", XContentType.JSON));
         ensureGreen();
 
         client().prepareIndex("test1", "bar", Integer.toString(1)).setSource("{\"bar\":\"bar\",\"baz\":\"baz\"}", XContentType.JSON).get();

core/src/test/java/org/elasticsearch/indices/template/SimpleIndexTemplateIT.java

@@ -807,7 +807,7 @@ public class SimpleIndexTemplateIT extends ESIntegTestCase {
         IllegalArgumentException eBadMapping = expectThrows(IllegalArgumentException.class,
             () -> client().admin().indices().preparePutTemplate("template_2")
                 .setPatterns(Collections.singletonList("te*"))
-                .addMapping("type", "{\"type\":{\"_routing\":{\"required\":false}}}")
+                .addMapping("type", "{\"type\":{\"_routing\":{\"required\":false}}}", XContentType.JSON)
                 .setSettings(Settings.builder()
                     .put("index.number_of_shards", "6")
                     .put("index.routing_partition_size", "3"))

core/src/test/java/org/elasticsearch/rest/RestControllerTests.java

@@ -277,40 +277,33 @@ public class RestControllerTests extends ESTestCase {
         assertTrue(channel.getSendResponseCalled());
     }
 
-    public void testDispatchWorksWithPlainText() {
+    public void testDispatchFailsWithPlainText() {
         String content = randomAsciiOfLengthBetween(1, BREAKER_LIMIT.bytesAsInt());
         FakeRestRequest fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
             .withContent(new BytesArray(content), null).withPath("/foo")
             .withHeaders(Collections.singletonMap("Content-Type", Collections.singletonList("text/plain"))).build();
-        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.OK);
+        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
         restController.registerHandler(RestRequest.Method.GET, "/foo", new RestHandler() {
             @Override
             public void handleRequest(RestRequest request, RestChannel channel, NodeClient client) throws Exception {
                 channel.sendResponse(new BytesRestResponse(RestStatus.OK, BytesRestResponse.TEXT_CONTENT_TYPE, BytesArray.EMPTY));
             }
-
-            @Override
-            public boolean supportsPlainText() {
-                return true;
-            }
         });
 
         assertFalse(channel.getSendResponseCalled());
         restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
         assertTrue(channel.getSendResponseCalled());
-        assertWarnings("Plain text request bodies are deprecated. Use request parameters or body in a supported format.");
     }
 
-    public void testDispatchWorksWithAutoDetection() {
+    public void testDispatchUnsupportedContentType() {
         FakeRestRequest fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
             .withContent(new BytesArray("{}"), null).withPath("/")
             .withHeaders(Collections.singletonMap("Content-Type", Collections.singletonList("application/x-www-form-urlencoded"))).build();
-        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.OK);
+        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
 
         assertFalse(channel.getSendResponseCalled());
         restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
         assertTrue(channel.getSendResponseCalled());
-        assertWarnings("Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.");
     }
 
     public void testDispatchWorksWithNewlineDelimitedJson() {
@@ -361,10 +354,10 @@ public class RestControllerTests extends ESTestCase {
         assertTrue(channel.getSendResponseCalled());
     }
 
-    public void testDispatchWithContentStreamAutoDetect() {
+    public void testDispatchWithContentStreamNoContentType() {
         FakeRestRequest fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
             .withContent(new BytesArray("{}"), null).withPath("/foo").build();
-        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.OK);
+        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
         restController.registerHandler(RestRequest.Method.GET, "/foo", new RestHandler() {
             @Override
             public void handleRequest(RestRequest request, RestChannel channel, NodeClient client) throws Exception {
@@ -380,48 +373,11 @@ public class RestControllerTests extends ESTestCase {
         assertFalse(channel.getSendResponseCalled());
         restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
         assertTrue(channel.getSendResponseCalled());
-        assertWarnings("Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.");
     }
 
     public void testNonStreamingXContentCausesErrorResponse() throws IOException {
-        // auto detect
         FakeRestRequest fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
-            .withContent(YamlXContent.contentBuilder().startObject().endObject().bytes(), null).withPath("/foo").build();
-        AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
-        restController.registerHandler(RestRequest.Method.GET, "/foo", new RestHandler() {
-            @Override
-            public void handleRequest(RestRequest request, RestChannel channel, NodeClient client) throws Exception {
-                channel.sendResponse(new BytesRestResponse(RestStatus.OK, BytesRestResponse.TEXT_CONTENT_TYPE, BytesArray.EMPTY));
-            }
-
-            @Override
-            public boolean supportsContentStream() {
-                return true;
-            }
-        });
-
-        assertFalse(channel.getSendResponseCalled());
-        restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
-        assertTrue(channel.getSendResponseCalled());
-
-        assertWarnings("Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.");
-
-        // specified
-        fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
             .withContent(YamlXContent.contentBuilder().startObject().endObject().bytes(), XContentType.YAML).withPath("/foo").build();
-        channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
-        assertFalse(channel.getSendResponseCalled());
-        restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
-        assertTrue(channel.getSendResponseCalled());
-    }
-
-    public void testStrictModeContentStream() {
-        restController = new RestController(
-            Settings.builder().put(HttpTransportSettings.SETTING_HTTP_CONTENT_TYPE_REQUIRED.getKey(), true).build(),
-            Collections.emptySet(), null, null, circuitBreakerService);
-        FakeRestRequest fakeRestRequest = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY)
-            .withContent(new BytesArray("{}"), null).withPath("/foo")
-            .build();
         AssertingChannel channel = new AssertingChannel(fakeRestRequest, true, RestStatus.NOT_ACCEPTABLE);
         restController.registerHandler(RestRequest.Method.GET, "/foo", new RestHandler() {
             @Override
@@ -459,7 +415,6 @@ public class RestControllerTests extends ESTestCase {
         assertFalse(channel.getSendResponseCalled());
         restController.dispatchRequest(fakeRestRequest, channel, new ThreadContext(Settings.EMPTY));
         assertTrue(channel.getSendResponseCalled());
-        assertWarnings("Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header.");
     }
 
     public void testDispatchBadRequest() {
@@ -519,7 +474,7 @@ public class RestControllerTests extends ESTestCase {
     }
 
     private static final class AssertingChannel extends AbstractRestChannel {
-        
+
         private final RestStatus expectedStatus;
         private final AtomicReference<RestResponse> responseReference = new AtomicReference<>();
 
@@ -533,15 +488,15 @@ public class RestControllerTests extends ESTestCase {
             assertEquals(expectedStatus, response.status());
             responseReference.set(response);
         }
-        
+
         RestResponse getRestResponse() {
             return responseReference.get();
         }
-        
+
         boolean getSendResponseCalled() {
             return getRestResponse() != null;
         }
-        
+
     }
 
     private static final class ExceptionThrowingChannel extends AbstractRestChannel {

core/src/test/java/org/elasticsearch/rest/RestRequestTests.java

@@ -23,6 +23,7 @@ import org.elasticsearch.ElasticsearchParseException;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.collect.MapBuilder;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.test.ESTestCase;
@@ -61,10 +62,12 @@ public class RestRequestTests extends ESTestCase {
         assertEquals(BytesArray.EMPTY, new ContentRestRequest("", emptyMap()).contentOrSourceParam().v2());
         assertEquals(new BytesArray("stuff"), new ContentRestRequest("stuff", emptyMap()).contentOrSourceParam().v2());
         assertEquals(new BytesArray("stuff"),
-            new ContentRestRequest("stuff", singletonMap("source", "stuff2")).contentOrSourceParam().v2());
+            new ContentRestRequest("stuff", MapBuilder.<String, String>newMapBuilder()
+                .put("source", "stuff2").put("source_content_type", "application/json").immutableMap()).contentOrSourceParam().v2());
         assertEquals(new BytesArray("{\"foo\": \"stuff\"}"),
-            new ContentRestRequest("", singletonMap("source", "{\"foo\": \"stuff\"}")).contentOrSourceParam().v2());
-        assertWarnings("Deprecated use of the [source] parameter without the [source_content_type] parameter.");
+            new ContentRestRequest("", MapBuilder.<String, String>newMapBuilder()
+                .put("source", "{\"foo\": \"stuff\"}").put("source_content_type", "application/json").immutableMap())
+                .contentOrSourceParam().v2());
     }
 
     public void testHasContentOrSourceParam() throws IOException {
@@ -80,8 +83,8 @@ public class RestRequestTests extends ESTestCase {
         assertEquals("Body required", e.getMessage());
         assertEquals(emptyMap(), new ContentRestRequest("{}", emptyMap()).contentOrSourceParamParser().map());
         assertEquals(emptyMap(), new ContentRestRequest("{}", singletonMap("source", "stuff2")).contentOrSourceParamParser().map());
-        assertEquals(emptyMap(), new ContentRestRequest("", singletonMap("source", "{}")).contentOrSourceParamParser().map());
-        assertWarnings("Deprecated use of the [source] parameter without the [source_content_type] parameter.");
+        assertEquals(emptyMap(), new ContentRestRequest("", MapBuilder.<String, String>newMapBuilder()
+            .put("source", "{}").put("source_content_type", "application/json").immutableMap()).contentOrSourceParamParser().map());
     }
 
     public void testWithContentOrSourceParamParserOrNull() throws IOException {
@@ -89,9 +92,10 @@ public class RestRequestTests extends ESTestCase {
         new ContentRestRequest("{}", emptyMap()).withContentOrSourceParamParserOrNull(parser -> assertEquals(emptyMap(), parser.map()));
         new ContentRestRequest("{}", singletonMap("source", "stuff2")).withContentOrSourceParamParserOrNull(parser ->
                 assertEquals(emptyMap(), parser.map()));
-        new ContentRestRequest("", singletonMap("source", "{}")).withContentOrSourceParamParserOrNull(parser ->
+        new ContentRestRequest("", MapBuilder.<String, String>newMapBuilder().put("source_content_type", "application/json")
+            .put("source", "{}").immutableMap())
+        .withContentOrSourceParamParserOrNull(parser ->
                 assertEquals(emptyMap(), parser.map()));
-        assertWarnings("Deprecated use of the [source] parameter without the [source_content_type] parameter.");
     }
 
     public void testContentTypeParsing() {

core/src/test/java/org/elasticsearch/routing/PartitionedRoutingIT.java

@@ -22,6 +22,7 @@ package org.elasticsearch.routing;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.test.ESIntegTestCase;
 import org.mockito.internal.util.collections.Sets;
@@ -42,7 +43,7 @@ public class PartitionedRoutingIT extends ESIntegTestCase {
                     .setSettings(Settings.builder()
                         .put("index.number_of_shards", shards)
                         .put("index.routing_partition_size", partitionSize))
-                    .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}")
+                    .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}", XContentType.JSON)
                     .execute().actionGet();
                 ensureGreen();
 
@@ -67,7 +68,7 @@ public class PartitionedRoutingIT extends ESIntegTestCase {
             .setSettings(Settings.builder()
                 .put("index.number_of_shards", currentShards)
                 .put("index.routing_partition_size", partitionSize))
-            .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}")
+            .addMapping("type", "{\"type\":{\"_routing\":{\"required\":true}}}", XContentType.JSON)
             .execute().actionGet();
         ensureGreen();
 

core/src/test/java/org/elasticsearch/search/aggregations/bucket/DateHistogramIT.java

@@ -23,6 +23,7 @@ import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.common.joda.DateMathParser;
 import org.elasticsearch.common.joda.Joda;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.mapper.DateFieldMapper;
 import org.elasticsearch.index.query.MatchNoneQueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
@@ -1051,7 +1052,7 @@ public class DateHistogramIT extends ESIntegTestCase {
 
     public void testSingleValueWithMultipleDateFormatsFromMapping() throws Exception {
         String mappingJson = jsonBuilder().startObject().startObject("type").startObject("properties").startObject("date").field("type", "date").field("format", "dateOptionalTime||dd-MM-yyyy").endObject().endObject().endObject().endObject().string();
-        prepareCreate("idx2").addMapping("type", mappingJson).execute().actionGet();
+        prepareCreate("idx2").addMapping("type", mappingJson, XContentType.JSON).execute().actionGet();
         IndexRequestBuilder[] reqs = new IndexRequestBuilder[5];
         for (int i = 0; i < reqs.length; i++) {
             reqs[i] = client().prepareIndex("idx2", "type", "" + i).setSource(jsonBuilder().startObject().field("date", "10-03-2014").endObject());

core/src/test/java/org/elasticsearch/search/aggregations/bucket/TermsDocCountErrorIT.java

@@ -23,6 +23,7 @@ import org.elasticsearch.action.index.IndexRequestBuilder;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.search.aggregations.Aggregator.SubAggCollectionMode;
 import org.elasticsearch.search.aggregations.bucket.terms.Terms;
 import org.elasticsearch.search.aggregations.bucket.terms.Terms.Bucket;
@@ -85,7 +86,8 @@ public class TermsDocCountErrorIT extends ESIntegTestCase {
                     .endObject()));
         }
         numRoutingValues = between(1,40);
-        assertAcked(prepareCreate("idx_with_routing").addMapping("type", "{ \"type\" : { \"_routing\" : { \"required\" : true } } }"));
+        assertAcked(prepareCreate("idx_with_routing")
+            .addMapping("type", "{ \"type\" : { \"_routing\" : { \"required\" : true } } }", XContentType.JSON));
         for (int i = 0; i < numDocs; i++) {
             builders.add(client().prepareIndex("idx_single_shard", "type", "" + i)
                 .setRouting(String.valueOf(randomInt(numRoutingValues)))

core/src/test/java/org/elasticsearch/search/basic/SearchWithRandomExceptionsIT.java

@@ -35,6 +35,7 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.settings.Settings.Builder;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.MockEngineFactoryPlugin;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.plugins.Plugin;
@@ -109,7 +110,7 @@ public class SearchWithRandomExceptionsIT extends ESIntegTestCase {
         logger.info("creating index: [test] using settings: [{}]", settings.build().getAsMap());
         assertAcked(prepareCreate("test")
                 .setSettings(settings)
-                .addMapping("type", mapping));
+                .addMapping("type", mapping, XContentType.JSON));
         ensureSearchable();
         final int numDocs = between(10, 100);
         int numCreated = 0;

core/src/test/java/org/elasticsearch/search/basic/SearchWithRandomIOExceptionsIT.java

@@ -31,6 +31,7 @@ import org.elasticsearch.client.Requests;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.search.sort.SortOrder;
@@ -92,7 +93,7 @@ public class SearchWithRandomIOExceptionsIT extends ESIntegTestCase {
             logger.info("creating index: [test] using settings: [{}]", settings.build().getAsMap());
             client().admin().indices().prepareCreate("test")
                 .setSettings(settings)
-                .addMapping("type", mapping).execute().actionGet();
+                .addMapping("type", mapping, XContentType.JSON).execute().actionGet();
             numInitialDocs = between(10, 100);
             ensureGreen();
             for (int i = 0; i < numInitialDocs; i++) {
@@ -114,7 +115,7 @@ public class SearchWithRandomIOExceptionsIT extends ESIntegTestCase {
             logger.info("creating index: [test] using settings: [{}]", settings.build().getAsMap());
             client().admin().indices().prepareCreate("test")
                 .setSettings(settings)
-                .addMapping("type", mapping).execute().actionGet();
+                .addMapping("type", mapping, XContentType.JSON).execute().actionGet();
         }
         ClusterHealthResponse clusterHealthResponse = client().admin().cluster()
             .health(Requests.clusterHealthRequest().waitForYellowStatus().timeout(TimeValue.timeValueSeconds(5))).get(); // it's OK to timeout here

core/src/test/java/org/elasticsearch/search/fetch/subphase/highlight/HighlighterSearchIT.java

@@ -29,6 +29,7 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.settings.Settings.Builder;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.AbstractQueryBuilder;
 import org.elasticsearch.index.query.IdsQueryBuilder;
 import org.elasticsearch.index.query.MatchQueryBuilder;
@@ -2902,7 +2903,7 @@ public class HighlighterSearchIT extends ESIntegTestCase {
                         .field("store", true)
                     .endObject()
                 .endObject().endObject().endObject().string();
-        prepareCreate("test").addMapping("type", mapping).get();
+        prepareCreate("test").addMapping("type", mapping, XContentType.JSON).get();
 
         client().prepareIndex("test", "type", "1").setSource(jsonBuilder().startObject().startArray("foo")
                     .startObject().field("text", "brown").endObject()

core/src/test/java/org/elasticsearch/search/fields/SearchFieldsIT.java

@@ -165,7 +165,7 @@ public class SearchFieldsIT extends ESIntegTestCase {
                 .startObject("field3").field("type", "text").field("store", true).endObject()
                 .endObject().endObject().endObject().string();
 
-        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping).execute().actionGet();
+        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping, XContentType.JSON).execute().actionGet();
 
         client().prepareIndex("test", "type1", "1").setSource(jsonBuilder().startObject()
                 .field("field1", "value1")
@@ -255,7 +255,7 @@ public class SearchFieldsIT extends ESIntegTestCase {
                 .startObject("num1").field("type", "double").field("store", true).endObject()
                 .endObject().endObject().endObject().string();
 
-        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping).execute().actionGet();
+        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping, XContentType.JSON).execute().actionGet();
 
         client().prepareIndex("test", "type1", "1")
                 .setSource(jsonBuilder().startObject()
@@ -560,7 +560,7 @@ public class SearchFieldsIT extends ESIntegTestCase {
                 .endObject()
                 .string();
 
-        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping).execute().actionGet();
+        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping, XContentType.JSON).execute().actionGet();
 
         client().prepareIndex("test", "type1", "1").setSource(jsonBuilder().startObject()
                 .field("byte_field", (byte) 1)
@@ -776,7 +776,7 @@ public class SearchFieldsIT extends ESIntegTestCase {
                 .endObject()
                 .string();
 
-        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping).execute().actionGet();
+        client().admin().indices().preparePutMapping().setType("type1").setSource(mapping, XContentType.JSON).execute().actionGet();
 
         ReadableDateTime date = new DateTime(2012, 3, 22, 0, 0, DateTimeZone.UTC);
         client().prepareIndex("test", "type1", "1").setSource(jsonBuilder().startObject()

core/src/test/java/org/elasticsearch/search/functionscore/DecayFunctionScoreIT.java

@@ -613,7 +613,7 @@ public class DecayFunctionScoreIT extends ESIntegTestCase {
                 .field("doc_values", true).endObject().startObject("geo").field("type", "geo_point")
                 .field("ignore_malformed", true);
         xContentBuilder.endObject().endObject().endObject().endObject();
-        assertAcked(prepareCreate("test").setSettings(settings).addMapping("type", xContentBuilder.string()));
+        assertAcked(prepareCreate("test").setSettings(settings).addMapping("type", xContentBuilder));
         int numDocs = 200;
         List<IndexRequestBuilder> indexBuilders = new ArrayList<>();
 

core/src/test/java/org/elasticsearch/search/geo/GeoFilterIT.java

@@ -215,7 +215,8 @@ public class GeoFilterIT extends ESIntegTestCase {
                 .endObject()
                 .endObject().string();
 
-        CreateIndexRequestBuilder mappingRequest = client().admin().indices().prepareCreate("shapes").addMapping("polygon", mapping);
+        CreateIndexRequestBuilder mappingRequest = client().admin().indices().prepareCreate("shapes")
+            .addMapping("polygon", mapping, XContentType.JSON);
         mappingRequest.execute().actionGet();
         client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForGreenStatus().execute().actionGet();
 
@@ -384,7 +385,7 @@ public class GeoFilterIT extends ESIntegTestCase {
                 .endObject();
 
         client().admin().indices().prepareCreate("countries").setSettings(settings)
-                .addMapping("country", xContentBuilder.string()).execute().actionGet();
+                .addMapping("country", xContentBuilder).execute().actionGet();
         BulkResponse bulk = client().prepareBulk().add(bulkAction, 0, bulkAction.length, null, null, xContentBuilder.contentType()).get();
 
         for (BulkItemResponse item : bulk.getItems()) {

core/src/test/java/org/elasticsearch/search/geo/GeoShapeIntegrationIT.java

@@ -22,6 +22,7 @@ import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.routing.IndexShardRoutingTable;
 import org.elasticsearch.common.geo.builders.ShapeBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.GeoShapeFieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
@@ -47,7 +48,7 @@ public class GeoShapeIntegrationIT extends ESIntegTestCase {
                 .endObject().endObject().string();
 
         // create index
-        assertAcked(prepareCreate(idxName).addMapping("shape", mapping));
+        assertAcked(prepareCreate(idxName).addMapping("shape", mapping, XContentType.JSON));
 
         mapping = XContentFactory.jsonBuilder().startObject().startObject("shape")
                 .startObject("properties").startObject("location")
@@ -56,7 +57,7 @@ public class GeoShapeIntegrationIT extends ESIntegTestCase {
                 .endObject().endObject()
                 .endObject().endObject().string();
 
-        assertAcked(prepareCreate(idxName+"2").addMapping("shape", mapping));
+        assertAcked(prepareCreate(idxName+"2").addMapping("shape", mapping, XContentType.JSON));
         ensureGreen(idxName, idxName+"2");
 
         internalCluster().fullRestart();

core/src/test/java/org/elasticsearch/search/geo/GeoShapeQueryTests.java

@@ -67,7 +67,7 @@ public class GeoShapeQueryTests extends ESSingleNodeTestCase {
                 .field("type", "geo_shape")
                 .endObject().endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("test").addMapping("type1", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("test").addMapping("type1", mapping, XContentType.JSON).execute().actionGet();
         ensureGreen();
 
         client().prepareIndex("test", "type1", "aNullshape").setSource("{\"location\": null}", XContentType.JSON)
@@ -83,7 +83,7 @@ public class GeoShapeQueryTests extends ESSingleNodeTestCase {
                 .field("tree", "quadtree")
                 .endObject().endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("test").addMapping("type1", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("test").addMapping("type1", mapping, XContentType.JSON).execute().actionGet();
         ensureGreen();
 
         client().prepareIndex("test", "type1", "1").setSource(jsonBuilder().startObject()
@@ -130,7 +130,7 @@ public class GeoShapeQueryTests extends ESSingleNodeTestCase {
                 .field("tree", "quadtree")
                 .endObject().endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("test").addMapping("type1", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("test").addMapping("type1", mapping, XContentType.JSON).execute().actionGet();
         ensureGreen();
 
         client().prepareIndex("test", "type1", "blakely").setSource(jsonBuilder().startObject()
@@ -167,7 +167,7 @@ public class GeoShapeQueryTests extends ESSingleNodeTestCase {
                 .field("tree", "quadtree")
                 .endObject().endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("test").addMapping("type1", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("test").addMapping("type1", mapping, XContentType.JSON).execute().actionGet();
         createIndex("shapes");
         ensureGreen();
 
@@ -449,7 +449,7 @@ public class GeoShapeQueryTests extends ESSingleNodeTestCase {
                 .endObject().endObject()
                 .endObject().endObject().string();
 
-        client().admin().indices().prepareCreate("geo_points_only").addMapping("type1", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("geo_points_only").addMapping("type1", mapping, XContentType.JSON).execute().actionGet();
         ensureGreen();
 
         ShapeBuilder shape = RandomShapeGenerator.createShape(random());

core/src/test/java/org/elasticsearch/search/morelikethis/MoreLikeThisIT.java

@@ -28,6 +28,7 @@ import org.elasticsearch.cluster.health.ClusterHealthStatus;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.MoreLikeThisQueryBuilder;
 import org.elasticsearch.index.query.MoreLikeThisQueryBuilder.Item;
 import org.elasticsearch.index.query.QueryBuilders;
@@ -152,7 +153,7 @@ public class MoreLikeThisIT extends ESIntegTestCase {
                 .startObject("properties")
                 .endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate(indexName).addMapping(typeName, mapping).get();
+        client().admin().indices().prepareCreate(indexName).addMapping(typeName, mapping, XContentType.JSON).get();
         client().admin().indices().prepareAliases().addAlias(indexName, aliasName).get();
 
         assertThat(ensureGreen(), equalTo(ClusterHealthStatus.GREEN));
@@ -174,7 +175,7 @@ public class MoreLikeThisIT extends ESIntegTestCase {
                 .startObject("properties")
                 .endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("foo").addMapping("bar", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("foo").addMapping("bar", mapping, XContentType.JSON).execute().actionGet();
         client().prepareIndex("foo", "bar", "1")
                 .setSource(jsonBuilder().startObject().startObject("foo").field("bar", "boz").endObject().endObject())
                 .execute().actionGet();
@@ -197,7 +198,7 @@ public class MoreLikeThisIT extends ESIntegTestCase {
                 .startObject("properties")
                 .endObject()
                 .endObject().endObject().string();
-        client().admin().indices().prepareCreate("foo").addMapping("bar", mapping).execute().actionGet();
+        client().admin().indices().prepareCreate("foo").addMapping("bar", mapping, XContentType.JSON).execute().actionGet();
         ensureGreen();
 
         client().prepareIndex("foo", "bar", "1")
@@ -220,7 +221,7 @@ public class MoreLikeThisIT extends ESIntegTestCase {
                 .endObject().endObject().string();
         assertAcked(prepareCreate("foo", 2,
                 Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 2).put(SETTING_NUMBER_OF_REPLICAS, 0))
-                .addMapping("bar", mapping));
+                .addMapping("bar", mapping, XContentType.JSON));
         ensureGreen();
 
         client().prepareIndex("foo", "bar", "1")

core/src/test/java/org/elasticsearch/search/query/SimpleQueryStringIT.java

@@ -313,7 +313,8 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
                 .endObject()
                 .endObject().string();
 
-        CreateIndexRequestBuilder mappingRequest = client().admin().indices().prepareCreate("test1").addMapping("type1", mapping);
+        CreateIndexRequestBuilder mappingRequest = client().admin().indices().prepareCreate("test1")
+            .addMapping("type1", mapping, XContentType.JSON);
         mappingRequest.execute().actionGet();
         indexRandom(true, client().prepareIndex("test1", "type1", "1").setSource("location", "Köln"));
         refresh();
@@ -364,7 +365,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
         CreateIndexRequestBuilder mappingRequest = client().admin().indices()
                 .prepareCreate("test1")
-                .addMapping("type1", mapping);
+                .addMapping("type1", mapping, XContentType.JSON);
         mappingRequest.execute().actionGet();
         indexRandom(true, client().prepareIndex("test1", "type1", "1").setSource("body", "Some Text"));
         refresh();
@@ -377,7 +378,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testBasicAllQuery() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -405,7 +406,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testWithDate() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -432,7 +433,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testWithLotsOfTypes() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -465,7 +466,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testDocWithAllTypes() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -515,7 +516,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testKeywordWithWhitespace() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -536,7 +537,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
     public void testExplicitAllFieldsRequested() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index-with-all.json");
         prepareCreate("test")
-                .setSource(indexBody)
+                .setSource(indexBody, XContentType.JSON)
                 // .setSettings(Settings.builder().put("index.version.created", Version.V_5_0_0.id)).get();
                 .get();
         ensureGreen("test");
@@ -564,7 +565,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
     @LuceneTestCase.AwaitsFix(bugUrl="currently can't perform phrase queries on fields that don't support positions")
     public void testPhraseQueryOnFieldWithNoPositions() throws Exception {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         List<IndexRequestBuilder> reqs = new ArrayList<>();
@@ -579,7 +580,7 @@ public class SimpleQueryStringIT extends ESIntegTestCase {
 
     public void testAllFieldsWithSpecifiedLeniency() throws IOException {
         String indexBody = copyToStringFromClasspath("/org/elasticsearch/search/query/all-query-index.json");
-        prepareCreate("test").setSource(indexBody).get();
+        prepareCreate("test").setSource(indexBody, XContentType.JSON).get();
         ensureGreen("test");
 
         Exception e = expectThrows(Exception.class, () ->

core/src/test/java/org/elasticsearch/search/slice/SearchSliceIT.java

@@ -26,6 +26,7 @@ import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.search.Scroll;
 import org.elasticsearch.search.SearchContextException;
 import org.elasticsearch.search.SearchHit;
@@ -71,7 +72,7 @@ public class SearchSliceIT extends ESIntegTestCase {
         assertAcked(client().admin().indices().prepareCreate("test")
             .setSettings("number_of_shards", numberOfShards,
                          "index.max_slices_per_scroll", 10000)
-            .addMapping("type", mapping));
+            .addMapping("type", mapping, XContentType.JSON));
         ensureGreen();
 
         if (withDocs == false) {

core/src/test/java/org/elasticsearch/search/sort/SimpleSortIT.java

@@ -25,6 +25,7 @@ import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.action.search.ShardSearchFailure;
 import org.elasticsearch.common.geo.GeoPoint;
 import org.elasticsearch.common.geo.GeoUtils;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.fielddata.ScriptDocValues;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.script.MockScriptPlugin;
@@ -243,7 +244,7 @@ public class SimpleSortIT extends ESIntegTestCase {
                     .endObject()
                 .endObject().string();
 
-        assertAcked(prepareCreate("test").addMapping("type1", mapping));
+        assertAcked(prepareCreate("test").addMapping("type1", mapping, XContentType.JSON));
         ensureGreen();
 
         for (int i = 0; i < 10; i++) {
@@ -355,7 +356,7 @@ public class SimpleSortIT extends ESIntegTestCase {
                         .endObject()
                     .endObject()
                 .endObject().string();
-        assertAcked(prepareCreate("test").addMapping("type1", mapping));
+        assertAcked(prepareCreate("test").addMapping("type1", mapping, XContentType.JSON));
         ensureGreen();
 
         client().prepareIndex("test", "type1")

core/src/test/java/org/elasticsearch/search/suggest/CompletionSuggestSearchIT.java

@@ -35,6 +35,7 @@ import org.elasticsearch.common.FieldMemoryStats;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.Fuzziness;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.search.aggregations.AggregationBuilders;
@@ -1064,7 +1065,7 @@ public class CompletionSuggestSearchIT extends ESIntegTestCase {
                 .endObject()
                 .string();
 
-        assertAcked(client().admin().indices().prepareCreate(INDEX).addMapping(TYPE, mapping).get());
+        assertAcked(client().admin().indices().prepareCreate(INDEX).addMapping(TYPE, mapping, XContentType.JSON).get());
         ensureGreen();
 
         client().prepareIndex(INDEX, TYPE, "1").setSource(FIELD, "strings make me happy", FIELD + "_1", "nulls make me sad")

distribution/integ-test-zip/src/test/java/org/elasticsearch/test/rest/WaitForRefreshAndCloseTests.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.test.rest;
 
 import org.apache.http.HttpEntity;
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.util.EntityUtils;
 import org.elasticsearch.action.ActionFuture;
@@ -50,7 +51,8 @@ public class WaitForRefreshAndCloseTests extends ESRestTestCase {
             // If we get an error, it should be because the index doesn't exist
             assertEquals(404, e.getResponse().getStatusLine().getStatusCode());
         }
-        client().performRequest("PUT", indexName(), emptyMap(), new StringEntity("{\"settings\":{\"refresh_interval\":-1}}"));
+        client().performRequest("PUT", indexName(), emptyMap(),
+            new StringEntity("{\"settings\":{\"refresh_interval\":-1}}", ContentType.APPLICATION_JSON));
     }
 
     @After
@@ -67,16 +69,17 @@ public class WaitForRefreshAndCloseTests extends ESRestTestCase {
     }
 
     public void testIndexAndThenClose() throws Exception {
-        closeWhileListenerEngaged(start("PUT", "", new StringEntity("{\"test\":\"test\"}")));
+        closeWhileListenerEngaged(start("PUT", "", new StringEntity("{\"test\":\"test\"}", ContentType.APPLICATION_JSON)));
     }
 
     public void testUpdateAndThenClose() throws Exception {
-        client().performRequest("PUT", docPath(), emptyMap(), new StringEntity("{\"test\":\"test\"}"));
-        closeWhileListenerEngaged(start("POST", "/_update", new StringEntity("{\"doc\":{\"name\":\"test\"}}")));
+        client().performRequest("PUT", docPath(), emptyMap(), new StringEntity("{\"test\":\"test\"}", ContentType.APPLICATION_JSON));
+        closeWhileListenerEngaged(start("POST", "/_update",
+            new StringEntity("{\"doc\":{\"name\":\"test\"}}", ContentType.APPLICATION_JSON)));
     }
 
     public void testDeleteAndThenClose() throws Exception {
-        client().performRequest("PUT", docPath(), emptyMap(), new StringEntity("{\"test\":\"test\"}"));
+        client().performRequest("PUT", docPath(), emptyMap(), new StringEntity("{\"test\":\"test\"}", ContentType.APPLICATION_JSON));
         closeWhileListenerEngaged(start("DELETE", "", null));
     }
 

docs/reference/api-conventions.asciidoc

@@ -675,22 +675,17 @@ should also be passed with a media type value that indicates the format
 of the source, such as `application/json`.
 
 [float]
-=== Content-Type auto-detection
+=== Content-Type Requirements
 
-deprecated[5.3.0, Provide the proper Content-Type header]
+The type of the content sent in a request body must be specified using
+the `Content-Type` header. The value of this header must map to one of
+the supported formats that the API supports. Most APIs support JSON,
+YAML, CBOR, and SMILE. The bulk and multi-search APIs support NDJSON,
+JSON and SMILE; other types will result in an error response.
 
-The content sent in a request body or using the `source` query string
-parameter is inspected to automatically determine the content type
-(JSON, YAML, SMILE, or CBOR).
-
-A strict mode can be enabled which disables auto-detection and requires
-that all requests with a body have a Content-Type header that maps to
-a supported format. To enabled this strict mode, add the following
-setting to the `elasticsearch.yml` file:
-
-    http.content_type.required: true
-
-The default value is `false`.
+Additionally, when using the `source` query string parameter the
+content type must be specified using the `source_content_type` query
+string parameter.
 
 [[url-access-control]]
 == URL-based access control

docs/reference/migration/migrate_6_0.asciidoc

@@ -37,6 +37,7 @@ way to reindex old indices is to use the `reindex` API.
 * <<breaking_60_scripting_changes>>
 * <<breaking_60_ingest_changes>>
 * <<breaking_60_percolator_changes>>
+* <<breaking_60_java_changes>>
 
 include::migrate_6_0/cat.asciidoc[]
 
@@ -63,3 +64,5 @@ include::migrate_6_0/scripting.asciidoc[]
 include::migrate_6_0/ingest.asciidoc[]
 
 include::migrate_6_0/percolator.asciidoc[]
+
+include::migrate_6_0/java.asciidoc[]

docs/reference/migration/migrate_6_0/java.asciidoc

@@ -0,0 +1,9 @@
+[[breaking_60_java_changes]]
+=== Java API changes
+
+==== `setSource` methods require XContentType
+
+Previously the `setSource` methods and other methods that accepted byte/string representations of
+an object source did not require the XContentType to be specified. The auto-detection of the content
+type is no longer used, so these methods now require the XContentType as an additional argument when
+providing the source in bytes or as a string.

docs/reference/migration/migrate_6_0/rest.asciidoc

@@ -19,6 +19,9 @@ In previous versions of Elasticsearch, having a proper Content-Type for the data
 Elasticsearch 6.0.0 enforces that all requests with a body must have a supported Content-Type and this type will
 be used when parsing the data.
 
+When using the `source` query string parameter, the `source_content_type` parameter must also be specified with
+the media type of the source.
+
 ==== Boolean API parameters
 
 All REST APIs parameters (both request parameters and JSON body) support providing boolean "false" as the

docs/reference/modules/http.asciidoc

@@ -100,9 +100,6 @@ simple message will be returned. Defaults to `true`
 
 |`http.pipelining.max_events` |The maximum number of events to be queued up in memory before a HTTP connection is closed, defaults to `10000`.
 
-|`http.content_type.required`|Enables or disables strict checking and usage of
-the `Content-Type` header for all requests with content, defaults to `false`.
-
 |=======================================================================
 
 It also uses the common

modules/reindex/src/main/java/org/elasticsearch/index/reindex/TransportUpdateByQueryAction.java

@@ -120,7 +120,7 @@ public class TransportUpdateByQueryAction extends HandledTransportAction<UpdateB
             index.index(doc.getIndex());
             index.type(doc.getType());
             index.id(doc.getId());
-            index.source(doc.getSource());
+            index.source(doc.getSource(), doc.getXContentType());
             index.versionType(VersionType.INTERNAL);
             index.version(doc.getVersion());
             index.setPipeline(mainRequest.getPipeline());

modules/reindex/src/test/java/org/elasticsearch/index/reindex/ReindexParentChildTests.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.index.reindex;
 
 import org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.query.QueryBuilder;
 
 import static org.elasticsearch.index.query.QueryBuilders.hasParentQuery;
@@ -89,8 +90,8 @@ public class ReindexParentChildTests extends ReindexTestCase {
      */
     private void createParentChildIndex(String indexName) throws Exception {
         CreateIndexRequestBuilder create = client().admin().indices().prepareCreate(indexName);
-        create.addMapping("city", "{\"_parent\": {\"type\": \"country\"}}");
-        create.addMapping("neighborhood", "{\"_parent\": {\"type\": \"city\"}}");
+        create.addMapping("city", "{\"_parent\": {\"type\": \"country\"}}", XContentType.JSON);
+        create.addMapping("neighborhood", "{\"_parent\": {\"type\": \"city\"}}", XContentType.JSON);
         assertAcked(create);
         ensureGreen();
     }

modules/reindex/src/test/java/org/elasticsearch/index/reindex/remote/RemoteScrollableHitSourceTests.java

@@ -389,7 +389,7 @@ public class RemoteScrollableHitSourceTests extends ESTestCase {
         assertEquals("No error body.", wrapped.getMessage());
 
         // Successfully get the status without a body
-        HttpEntity okEntity = new StringEntity("test body", StandardCharsets.UTF_8);
+        HttpEntity okEntity = new StringEntity("test body", ContentType.TEXT_PLAIN);
         wrapped = RemoteScrollableHitSource.wrapExceptionToPreserveStatus(status.getStatus(), okEntity, cause);
         assertEquals(status, wrapped.status());
         assertEquals(cause, wrapped.getCause());

modules/transport-netty4/src/test/java/org/elasticsearch/rest/Netty4HeadBodyIsEmptyIT.java

@@ -19,6 +19,7 @@
 
 package org.elasticsearch.rest;
 
+import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.common.xcontent.XContentBuilder;
@@ -55,7 +56,8 @@ public class Netty4HeadBodyIsEmptyIT extends ESRestTestCase {
                 builder.field("test", "test");
             }
             builder.endObject();
-            client().performRequest("PUT", "/" + indexName + "/" + typeName + "/" + "1", emptyMap(), new StringEntity(builder.string()));
+            client().performRequest("PUT", "/" + indexName + "/" + typeName + "/" + "1", emptyMap(),
+                new StringEntity(builder.string(), ContentType.APPLICATION_JSON));
         }
     }
 
@@ -100,7 +102,7 @@ public class Netty4HeadBodyIsEmptyIT extends ESRestTestCase {
             }
             builder.endObject();
 
-            client().performRequest("POST", "_aliases", emptyMap(), new StringEntity(builder.string()));
+            client().performRequest("POST", "_aliases", emptyMap(), new StringEntity(builder.string(), ContentType.APPLICATION_JSON));
             headTestCase("/_alias/test_alias", emptyMap(), greaterThan(0));
             headTestCase("/test/_alias/test_alias", emptyMap(), greaterThan(0));
         }
@@ -119,7 +121,8 @@ public class Netty4HeadBodyIsEmptyIT extends ESRestTestCase {
             }
             builder.endObject();
 
-            client().performRequest("PUT", "/_template/template", emptyMap(), new StringEntity(builder.string()));
+            client().performRequest("PUT", "/_template/template", emptyMap(),
+                new StringEntity(builder.string(), ContentType.APPLICATION_JSON));
             headTestCase("/_template/template", emptyMap(), greaterThan(0));
         }
     }
@@ -147,7 +150,7 @@ public class Netty4HeadBodyIsEmptyIT extends ESRestTestCase {
                 builder.endObject();
             }
             builder.endObject();
-            client().performRequest("PUT", "/test-no-source", emptyMap(), new StringEntity(builder.string()));
+            client().performRequest("PUT", "/test-no-source", emptyMap(), new StringEntity(builder.string(), ContentType.APPLICATION_JSON));
             createTestDoc("test-no-source", "test-no-source");
             headTestCase("/test-no-source/test-no-source/1/_source", emptyMap(), NOT_FOUND.getStatus(), equalTo(0));
         }