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Posted to mapreduce-issues@hadoop.apache.org by "Mohammad Shahid Khan (JIRA)" <ji...@apache.org> on 2015/12/19 10:42:46 UTC

[jira] [Commented] (MAPREDUCE-6574) MR AM should print host of failed tasks.

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15065314#comment-15065314 ] 

Mohammad Shahid Khan commented on MAPREDUCE-6574:
-------------------------------------------------

Hi [#Wangda Tan], hope the current patch could address the issue.

> MR AM should print host of failed tasks.
> ----------------------------------------
>
>                 Key: MAPREDUCE-6574
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6574
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Wangda Tan
>         Attachments: MAPREDUCE-6574-v1.patch
>
>
> Something tasks failed because of issues on NMs. For example, bad disk/network could cause reducer fetching failure and mappers need to be re-scheduled.
> It will be very helpful to identify such issues if we could print host of failed tasks, which we can simply grep MR AM's log to see what happened.



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