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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-430) Task stuck in cleanup with OutOfMemoryErrors
Date Thu, 20 Aug 2009 15:46:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12745463#action_12745463
] 

Amar Kamat commented on MAPREDUCE-430:
--------------------------------------

Spoke to Devaraj about this offline. So child can ignore Errors and catch only Exceptions
and FSError. But ReduceTask and MapTask still catch Throwable and eat it up. This can be serious
and hence we need to take care of this. There are multiple options
- dont catch Throwable only catch Exceptions
- catch Throwable and exit the jvm
- catch OOM and exit the jvm.

> Task stuck in cleanup with OutOfMemoryErrors
> --------------------------------------------
>
>                 Key: MAPREDUCE-430
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-430
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Amar Kamat
>             Fix For: 0.20.1
>
>         Attachments: MAPREDUCE-430-v1.6-branch-0.20.patch, MAPREDUCE-430-v1.6.patch,
MAPREDUCE-430-v1.7.patch, MAPREDUCE-430-v1.8.patch
>
>
> Obesrved a task with OutOfMemory error, stuck in cleanup.

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