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From "Thomas Graves (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-1238) mapred metrics shows negative count of waiting maps and reduces
Date Mon, 09 Apr 2012 21:45:17 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250207#comment-13250207
] 

Thomas Graves commented on MAPREDUCE-1238:
------------------------------------------

I believe this will still miss a case when it is killed while in progress of initializing
the job.  If it receives a kill during that initialization it waits until init is done and
then throws to do the kill.  The tasksInited will not have been set to true because the throw
happens right before that is set and thus the metrics won't be properly decremented.  Working
on a fix for that.
                
> mapred metrics shows negative count of waiting maps and reduces 
> ----------------------------------------------------------------
>
>                 Key: MAPREDUCE-1238
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1238
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Ramya Sunil
>            Assignee: Thomas Graves
>         Attachments: MAPREDUCE-1238-v0.20-1.patch
>
>
> Negative waiting_maps and waiting_reduces count is observed in the mapred metrics

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