[jira] [Commented] (HADOOP-10090) Jobtracker metrics not updated properly after execution of a mapreduce job

["Chris Nauroth (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-10090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13820293#comment-13820293 ] 

Chris Nauroth commented on HADOOP-10090:
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Another possibility could be to change {{MetricsSourceAdapter#getMetrics}} to combine the prior elements of a non-null {{lastRecs}} with the new values.  Right now, it's just a complete overwrite, so "unconsumed" values from the prior run get dropped.  If we combine, then we might need to de-duplicate (not simply append), and I haven't yet thought about whether or not this brings additional complexity.

> Jobtracker metrics not updated properly after execution of a mapreduce job
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-10090
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10090
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 1.2.1
>            Reporter: Ivan Mitic
>            Assignee: Ivan Mitic
>         Attachments: OneBoxRepro.png
>
>
> After executing a wordcount mapreduce sample job, jobtracker metrics are not updated properly. Often times the response from the jobtracker has higher number of job_completed than job_submitted (for example 8 jobs completed and 7 jobs submitted). 
> Issue reported by Toma Paunovic.



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