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Posted to mapreduce-issues@hadoop.apache.org by "Thomas Graves (JIRA)" <ji...@apache.org> on 2012/06/25 17:40:42 UTC

[jira] [Commented] (MAPREDUCE-4366) mapred metrics shows negative count of waiting maps and reduces

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13400542#comment-13400542 ] 

Thomas Graves commented on MAPREDUCE-4366:
------------------------------------------

I was able to reproduce this using speculative execution and killing the job at the right point when it has speculative tasks running.  
                
> mapred metrics shows negative count of waiting maps and reduces
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-4366
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4366
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 1.0.2
>            Reporter: Thomas Graves
>            Assignee: Thomas Graves
>
> Negative waiting_maps and waiting_reduces count is observed in the mapred metrics.  MAPREDUCE-1238 partially fixed this but it appears there is still issues as we are seeing it, but not as bad.

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