Verify shard state if prepareCreate/prepareIndex fails

This is pretty much a workaround for the fact that we simply
close the downstream resources once the shard is closed. This means
the document parser will barf with NPE or something similar while
AlreadyClosedException would be approriate.

src/main/java/org/elasticsearch/index/shard/IndexShard.java

@@ -454,7 +454,12 @@ public class IndexShard extends AbstractIndexShardComponent {
     }
 
     public Engine.Create prepareCreate(SourceToParse source, long version, VersionType versionType, Engine.Operation.Origin origin, boolean canHaveDuplicates, boolean autoGeneratedId) {
-        return prepareCreate(docMapper(source.type()), source, version, versionType, origin, state != IndexShardState.STARTED || canHaveDuplicates, autoGeneratedId);
+        try {
+            return prepareCreate(docMapper(source.type()), source, version, versionType, origin, state != IndexShardState.STARTED || canHaveDuplicates, autoGeneratedId);
+        } catch (Throwable t) {
+            verifyNotClosed(t);
+            throw t;
+        }
     }
 
     static Engine.Create prepareCreate(Tuple<DocumentMapper, Mapping> docMapper, SourceToParse source, long version, VersionType versionType, Engine.Operation.Origin origin, boolean canHaveDuplicates, boolean autoGeneratedId) {
@@ -484,7 +489,12 @@ public class IndexShard extends AbstractIndexShardComponent {
     }
 
     public Engine.Index prepareIndex(SourceToParse source, long version, VersionType versionType, Engine.Operation.Origin origin, boolean canHaveDuplicates) {
-        return prepareIndex(docMapper(source.type()), source, version, versionType, origin, state != IndexShardState.STARTED || canHaveDuplicates);
+        try {
+            return prepareIndex(docMapper(source.type()), source, version, versionType, origin, state != IndexShardState.STARTED || canHaveDuplicates);
+        } catch (Throwable t) {
+            verifyNotClosed(t);
+            throw t;
+        }
     }
 
     static Engine.Index prepareIndex(Tuple<DocumentMapper, Mapping> docMapper, SourceToParse source, long version, VersionType versionType, Engine.Operation.Origin origin, boolean canHaveDuplicates) {
@@ -932,9 +942,17 @@ public class IndexShard extends AbstractIndexShardComponent {
     }
 
     private void verifyNotClosed() throws IllegalIndexShardStateException {
+        verifyNotClosed(null);
+    }
+
+    private void verifyNotClosed(Throwable suppressed) throws IllegalIndexShardStateException {
         IndexShardState state = this.state; // one time volatile read
         if (state == IndexShardState.CLOSED) {
-            throw new IllegalIndexShardStateException(shardId, state, "operation only allowed when not closed");
+            final IllegalIndexShardStateException exc = new IllegalIndexShardStateException(shardId, state, "operation only allowed when not closed");
+            if (suppressed != null) {
+                exc.addSuppressed(suppressed);
+            }
+            throw exc;
         }
     }