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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5046) backport MAPREDUCE-1423 to mapred.lib.CombineFileInputFormat
Date Mon, 06 May 2013 02:58:16 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13649491#comment-13649491
] 

Matt Foley commented on MAPREDUCE-5046:
---------------------------------------

Changing fixVersion to 1.3.0 per MAPREDUCE-5038.
                
> backport MAPREDUCE-1423 to mapred.lib.CombineFileInputFormat
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-5046
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5046
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.1.1
>            Reporter: Sangjin Lee
>             Fix For: 1.3.0
>
>
> The CombineFileInputFormat class in org.apache.hadoop.mapred.lib (the old API) has a
couple of issues. These issues were addressed in the new API (MAPREDUCE-1423), but the old
class was not fixed.
> The main issue the JIRA refers to is a performance problem. However, IMO there is a more
serious problem which is a thread-safety issue (rackToNodes) which was fixed alongside.
> What is the policy on addressing issues in the old API? Can we backport this to the old
class?

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