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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/18 23:00:16 UTC

[jira] [Resolved] (MAPREDUCE-148) A successful tip can fail unnecessarily

     [ https://issues.apache.org/jira/browse/MAPREDUCE-148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved MAPREDUCE-148.
----------------------------------------

    Resolution: Incomplete

Closing as stale.

> A successful tip can fail unnecessarily
> ---------------------------------------
>
>                 Key: MAPREDUCE-148
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-148
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Amar Kamat
>
> Consider the following sequence of events
> 1. tip _t_ has 5 attempts, _attempt_0-4_. Lets assume that _attempt_0,attempt_1_ and _attempt_2_ have failed. _attempt_3_ and _attempt_4_ are running. 
> 2. _attempt_3_ runs on tracker _t1_ and attempt_4 runs on tracker _t2_
> 3. _attempt_3_ reports success and the tip _t_ is marked successful
> 4. _attempt_4_ reports failure and the tip _t_ is failed based on the call to _TaskInProgress.incompleteSubTask()_.
> Here the tip _t_ is failed unnecessarily.



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