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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2014/10/01 00:02:38 UTC

[jira] [Commented] (TEZ-1635) Dag gets stuck intermittently

    [ https://issues.apache.org/jira/browse/TEZ-1635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153848#comment-14153848 ] 

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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