Github user sachouche commented on a diff in the pull request: https://github.com/apache/drill/pull/1237#discussion_r184728292 --- 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 -- Ignore this comment as I thought you were releasing the returned batch.
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