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Posted to mapreduce-issues@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/21 19:24:40 UTC

[jira] [Resolved] (MAPREDUCE-405) ReduceTask logs show negative values

     [ https://issues.apache.org/jira/browse/MAPREDUCE-405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Allen Wittenauer resolved MAPREDUCE-405.
----------------------------------------

    Resolution: Fixed

I haven't seen this in forever, so I'm guess it's been fixed. Closing. 

> ReduceTask logs show negative values
> ------------------------------------
>
>                 Key: MAPREDUCE-405
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-405
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Amar Kamat
>            Priority: Minor
>
> While running some tests I can see negative values in reducers log. Something like 
> {noformat}
>  localhost Will be considered after:  -2 seconds
> {noformat}
> Looking at the code it looks like this happens when a node which was temporarily down comes back (i.e becomes available). In such a case the node is still in the penalty box and also in the unique hosts structure.



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