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From "Jothi Padmanabhan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1140) Per cache-file refcount can become negative when tasks release distributed-cache files
Date Sat, 14 Nov 2009 02:44:39 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777809#action_12777809
] 

Jothi Padmanabhan commented on MAPREDUCE-1140:
----------------------------------------------

In {{getLocalCache}}, if the file is already present, only reference count is incremented,
so does not throw any IOExceptions. If the file is not present, {{cachedArchives.put}} is
done only after the necessary processing (read methods that can throw IOExceptions) is complete.
So, I do not think this patch will lead to any inconsistency.

I however do agree that it is a good idea to do the refactor of test case to avoid duplication.

> Per cache-file refcount can become negative when tasks release distributed-cache files
> --------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1140
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1140
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.20.2, 0.21.0, 0.22.0
>            Reporter: Vinod K V
>            Assignee: Amareshwari Sriramadasu
>         Attachments: patch-1140-1.txt, patch-1140-ydist.txt, patch-1140.txt
>
>


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