Github user vrozov commented on a diff in the pull request:
https://github.com/apache/drill/pull/1237#discussion_r184585959
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/unorderedreceiver/UnorderedReceiverBatch.java
---
@@ -149,25 +149,32 @@ private RawFragmentBatch getNextBatch() throws
IOException {
}
}
+ private RawFragmentBatch getNextNotEmptyBatch() throws IOException {
+ RawFragmentBatch batch;
+ try {
+ stats.startWait();
+ batch = getNextBatch();
+
+ // skip over empty batches. we do this since these are basically
control messages.
+ while (batch != null && batch.getHeader().getDef().getRecordCount()
== 0
--- End diff --
Please explain why it can't be released. Note that the release is done for
the batch that will *not* be returned from the method.
---
