Fix put/resume follow request parsing (#34913)

This commit adds some fields that were missing from put follow, and
fixes a bug in resume follow.

x-pack/plugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/action/ShardFollowTask.java

@@ -73,14 +73,16 @@ public class ShardFollowTask implements XPackPlugin.XPackPersistentTaskParams {
         PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_READ_REQUEST_OPERATION_COUNT);
         PARSER.declareField(
                 ConstructingObjectParser.constructorArg(),
-                (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_READ_REQUEST_SIZE.getPreferredName()), MAX_READ_REQUEST_SIZE,
+                (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_READ_REQUEST_SIZE.getPreferredName()),
+                MAX_READ_REQUEST_SIZE,
                 ObjectParser.ValueType.STRING);
         PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_OUTSTANDING_READ_REQUESTS);
         PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_WRITE_REQUEST_OPERATION_COUNT);
         PARSER.declareField(
-            ConstructingObjectParser.constructorArg(),
-            (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_WRITE_BUFFER_SIZE.getPreferredName()), MAX_WRITE_REQUEST_SIZE,
-            ObjectParser.ValueType.STRING);
+                ConstructingObjectParser.constructorArg(),
+                (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_WRITE_REQUEST_SIZE.getPreferredName()),
+                MAX_WRITE_REQUEST_SIZE,
+                ObjectParser.ValueType.STRING);
         PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_OUTSTANDING_WRITE_REQUESTS);
         PARSER.declareInt(ConstructingObjectParser.constructorArg(), MAX_WRITE_BUFFER_COUNT);
         PARSER.declareField(

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ccr/action/PutFollowAction.java

@@ -34,6 +34,8 @@ import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request
 import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.MAX_RETRY_DELAY_FIELD;
 import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.MAX_WRITE_BUFFER_COUNT;
 import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.MAX_WRITE_BUFFER_SIZE;
+import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.MAX_WRITE_REQUEST_OPERATION_COUNT;
+import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.MAX_WRITE_REQUEST_SIZE;
 import static org.elasticsearch.xpack.core.ccr.action.ResumeFollowAction.Request.READ_POLL_TIMEOUT;
 
 public final class PutFollowAction extends Action<PutFollowAction.Response> {
@@ -66,12 +68,18 @@ public final class PutFollowAction extends Action<PutFollowAction.Response> {
             PARSER.declareString(Request::setLeaderIndex, LEADER_INDEX_FIELD);
             PARSER.declareString((req, val) -> req.followRequest.setFollowerIndex(val), FOLLOWER_INDEX_FIELD);
             PARSER.declareInt((req, val) -> req.followRequest.setMaxReadRequestOperationCount(val), MAX_READ_REQUEST_OPERATION_COUNT);
-            PARSER.declareInt((req, val) -> req.followRequest.setMaxOutstandingReadRequests(val), MAX_OUTSTANDING_READ_REQUESTS);
             PARSER.declareField(
                 (req, val) -> req.followRequest.setMaxReadRequestSize(val),
                 (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_READ_REQUEST_SIZE.getPreferredName()),
                 MAX_READ_REQUEST_SIZE,
                 ObjectParser.ValueType.STRING);
+            PARSER.declareInt((req, val) -> req.followRequest.setMaxOutstandingReadRequests(val), MAX_OUTSTANDING_READ_REQUESTS);
+            PARSER.declareInt((req, val) -> req.followRequest.setMaxWriteRequestOperationCount(val), MAX_WRITE_REQUEST_OPERATION_COUNT);
+            PARSER.declareField(
+                    (req, val) -> req.followRequest.setMaxWriteRequestSize(val),
+                    (p, c) -> ByteSizeValue.parseBytesSizeValue(p.text(), MAX_WRITE_REQUEST_SIZE.getPreferredName()),
+                    MAX_WRITE_REQUEST_SIZE,
+                    ObjectParser.ValueType.STRING);
             PARSER.declareInt((req, val) -> req.followRequest.setMaxOutstandingWriteRequests(val), MAX_OUTSTANDING_WRITE_REQUESTS);
             PARSER.declareInt((req, val) -> req.followRequest.setMaxWriteBufferCount(val), MAX_WRITE_BUFFER_COUNT);
             PARSER.declareField(