[jira] [Created] (PIG-4580) Fix TestTezAutoParallelism.testSkewedJoinIncreaseParallelism test failure

["Daniel Dai (JIRA)" <ji...@apache.org>]

Daniel Dai created PIG-4580:
-------------------------------

             Summary: Fix TestTezAutoParallelism.testSkewedJoinIncreaseParallelism test failure
                 Key: PIG-4580
                 URL: https://issues.apache.org/jira/browse/PIG-4580
             Project: Pig
          Issue Type: Bug
          Components: tez
            Reporter: Daniel Dai
            Assignee: Daniel Dai
             Fix For: 0.15.0


If a vertex need to increase parallelism dynamically, it cannot has additional broadcast input. In the test case, join vertex requires a broadcast edge to acquire sample file (used in IsFirstReduceOfKeyTez), and the join vertex use PartitionerDefinedVertexManager which can increase parallelism dynamically. If that happens, we will see exception:
{code}
Fetch failed:java.lang.IndexOutOfBoundsException
	at java.nio.Buffer.checkIndex(Buffer.java:532)
	at java.nio.ByteBufferAsLongBufferB.get(ByteBufferAsLongBufferB.java:115)
	at org.apache.tez.runtime.library.common.sort.impl.TezSpillRecord.getIndex(TezSpillRecord.java:101)
	at org.apache.tez.runtime.library.common.shuffle.Fetcher.getTezIndexRecord(Fetcher.java:596)
	at org.apache.tez.runtime.library.common.shuffle.Fetcher.doLocalDiskFetch(Fetcher.java:537)
	at org.apache.tez.runtime.library.common.shuffle.Fetcher.setupLocalDiskFetch(Fetcher.java:518)
	at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:191)
	at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:70)
	at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
{code}

The fix disable dynamic parallelism if there is a broadcast edge (including sample file in skewed outer join, scalar followed by skewed join/order by). Also in inner skewed join, the sample file is not needed in join vertex, so it is not necessarily to broadcast it thus disable dynamic parallelism.



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