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Posted to mapreduce-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2012/08/27 20:06:07 UTC
[jira] [Commented] (MAPREDUCE-4595) TestLostTracker failing -
possibly due to a race in JobHistory.JobHistoryFilesManager#run()
[ https://issues.apache.org/jira/browse/MAPREDUCE-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13442560#comment-13442560 ]
Karthik Kambatla commented on MAPREDUCE-4595:
---------------------------------------------
* I meant fool proof approach in my previous comment.
With the patch, the test passes, in the presence of the sleep in JobHistoryFilesManager#run() as in the force-failure patch.
> TestLostTracker failing - possibly due to a race in JobHistory.JobHistoryFilesManager#run()
> -------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4595
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4595
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 1.0.3
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Priority: Critical
> Labels: test
> Attachments: force-TestLostTracker-failure.patch, MR-4595.patch
>
>
> The source for occasional failure of TestLostTracker seems like the following:
> On job completion, JobHistoryFilesManager#run() spawns another thread to move history files to done folder. TestLostTracker waits for job completion, before checking the file format of the history file. However, the history files move might be in the process or might not have started in the first place.
> I am uploading a patch that significantly increases the chance of hitting this race.
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