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From "Mohammad Shahid Khan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6574) MR AM should print host of failed tasks.
Date Wed, 23 Dec 2015 18:57:46 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070043#comment-15070043
] 

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

Hi [#Wangda Tan] please review the current patch 

> 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
>            Assignee: Mohammad Shahid Khan
>         Attachments: MAPREDUCE-6574-v1.patch, MAPREDUCE-6574-v2.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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