DRILL-2826: Simplify and centralize Operator Cleanup

- Remove cleanup method from RecordBatch interface
- Make OperatorContext creation and closing the management of FragmentContext
- Make OperatorContext an abstract class and the impl only available to FragmentContext
- Make RecordBatch closing the responsibility of the RootExec
- Make all closes be suppresing closes to maximize memory release in failure
- Add new CloseableRecordBatch interface used by RootExec
- Make RootExec AutoCloseable
- Update RecordBatchCreator to return CloseableRecordBatches so that RootExec can maintain list
- Generate list of operators through change in ImplCreator

1 files changed, 1 insertions, 1 deletions

diff --git a/exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/MergingReceiverCreator.java b/exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/MergingReceiverCreator.java
index daef44cce..1bf6c0105 100644
--- a/exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/MergingReceiverCreator.java
+++ b/exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/MergingReceiverCreator.java
@@ -32,7 +32,7 @@ public class MergingReceiverCreator implements BatchCreator<MergingReceiverPOP>
   static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(MergingReceiverCreator.class);
 
   @Override
-  public RecordBatch getBatch(FragmentContext context,
+  public MergingRecordBatch getBatch(FragmentContext context,
                               MergingReceiverPOP receiver,
                               List<RecordBatch> children)
       throws ExecutionSetupException, OutOfMemoryException {