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https://issues.apache.org/jira/browse/TEZ-1261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054561#comment-14054561
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Rohini Palaniswamy commented on TEZ-1261:
-----------------------------------------
That's right.
ShuffleVertexManager.CustomShuffleEdgeManager.getNumDestinationTaskPhysicalInputs()
was returning 4 when it is supposed to return 2.
ShuffleScheduler.waitUntilDone() is then stuck with remainingMaps = 2 (4-2) as
there are only 2 actual inputs.
> ShuffleVertexManager auto parallelism is broken after TEZ-1131
> --------------------------------------------------------------
>
> Key: TEZ-1261
> URL: https://issues.apache.org/jira/browse/TEZ-1261
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Daniel Dai
> Assignee: Bikas Saha
> Fix For: 0.5.0
>
> Attachments: syslog_dag_1404758486092_0018_1
>
>
> A plain 3 vertex join hang forever when turn on auto-parallelism. AM log
> attached.
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