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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