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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2495) The distributed cache cleanup thread has no monitoring to check to see if it has died for some reason
Date Tue, 17 May 2011 15:44:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13034827#comment-13034827
] 

Hadoop QA commented on MAPREDUCE-2495:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12479465/MAPREDUCE-2495-20.20X-V1.patch
  against trunk revision 1103993.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/hudson/job/PreCommit-MAPREDUCE-Build/257//console

This message is automatically generated.

> The distributed cache cleanup thread has no monitoring to check to see if it has died
for some reason
> -----------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2495
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2495
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: distributed-cache
>    Affects Versions: 0.21.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>            Priority: Minor
>         Attachments: MAPREDUCE-2495-20.20X-V1.patch, MAPREDUCE-2495-v1.patch
>
>
> The cleanup thread in the distributed cache handles IOExceptions and the like correctly,
but just to be a bit more defensive it would be good to monitor the thread, and check that
it is still alive regularly, so that the distributed cache does not fill up the entire disk
on the node. 

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