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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5548) Observed negative running maps on the job tracker
Date Sun, 22 Mar 2009 03:23:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12688096#action_12688096
] 

Owen O'Malley commented on HADOOP-5548:
---------------------------------------

It should still lock the JobTracker, since it violates the assumption of the method and could
easily be broken during later maintenance. 

We still need an explanation of what is going on.

> Observed negative running maps on the job tracker
> -------------------------------------------------
>
>                 Key: HADOOP-5548
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5548
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Owen O'Malley
>            Priority: Blocker
>
> We saw in both the web/ui and cli tools:
> {noformat}
> Cluster Summary (Heap Size is 11.7 GB/13.37 GB)
> Maps  Reduces Total       Nodes  Map Task  Reduce Task  Avg.     Blacklisted 
>               Submissions        Capacity   Capacity   Tasks/Node Nodes
> -971  0       133         434     1736        1736      8.00        0
> {noformat}

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