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https://issues.apache.org/jira/browse/TEZ-1635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153848#comment-14153848
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Bikas Saha commented on TEZ-1635:
---------------------------------
>From what I can see Map 5 vertex has 2 inputs - Legacy and MultiMR. For both
>tasks in Map5, only 1 InputDataInformationEvent is being sent to the tasks
>(presumably the one for the Legacy input). So it seems like one of the inputs
>for these 2 Map 5 tasks is hung waiting for inputs. That is reflected in the
>stacks for 2 children tasks attached to TEZ-1592. Maybe you can put more logs
>in the custom vertex manager for Map 5 to verify if the split events for the
>inputs are being generated and sent whenever the job hangs.
> Dag gets stuck intermittently
> -----------------------------
>
> Key: TEZ-1635
> URL: https://issues.apache.org/jira/browse/TEZ-1635
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.5.0
> Reporter: Vikram Dixit K
> Priority: Blocker
> Attachments: syslog_dag_1412109415326_0002_10.gz
>
>
> Attaching logs for the dag.
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