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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-697) Jobwise list of blacklisted tasktrackers doesn't get refreshed even after restarting blacklisted tasktrackers.
Date Tue, 07 Jul 2009 06:08:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12727938#action_12727938
] 

Owen O'Malley commented on MAPREDUCE-697:
-----------------------------------------

I'm not sure this is a good idea. TT are restarted for not reporting status for 10 minutes.
That should *not* reset the blacklist status. It should probably count as a strike against
that TT.

> Jobwise list of blacklisted tasktrackers doesn't get refreshed even after restarting
blacklisted tasktrackers.
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-697
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-697
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.20.1
>            Reporter: Suman Sehgal
>            Priority: Critical
>
> Jobwise list of blacklisted tasktrackers doesn't get refreshed even after restarting
blacklisted tasktrackers. "jobdetails.jsp" page keeps on showing the same no. of blacklisted
tasktrackers (it doesn't get back to zero).
> One associated issue:
> =================
> --> More than 25% of TTs are blacklisted in a job.
> --> Restart the blacklisted TTs. All the tasktrackers are healthy now.
> --> try to blacklist other TT for the same job.
> Not able to blacklist the "other" tasktracker even if  "mapred.max.tracker.failures"
exceeds the specified limit.

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