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From Rémy SAISSY (JIRA) <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5264) FileAlreadyExistsException is assumed to be thrown by FileSystem#mkdirs or FileContext#mkdir in the codebase
Date Sat, 08 Jun 2013 08:02:21 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13678705#comment-13678705
] 

Rémy SAISSY commented on MAPREDUCE-5264:
----------------------------------------

It was mainly about removing catch() {} with a logging statement inside.
No need to add test cases for it.
                
> FileAlreadyExistsException is assumed to be thrown by FileSystem#mkdirs or FileContext#mkdir
in the codebase
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5264
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5264
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 2.1.0-beta
>            Reporter: Rémy SAISSY
>         Attachments: MAPREDUCE-5264.20130607.1.patch
>
>
> According to https://issues.apache.org/jira/browse/HADOOP-9438,
> FileSystem#mkdirs and FileContext#mkdir do not throw FileAlreadyExistsException if the
directory already exist.
> Some places in the mapreduce codebase assumes FileSystem#mkdirs or FileContext#mkdir
throw FileAlreadyExistsException.
> At least the following files are concerned:
>  - YarnChild.java
>  - JobHistoryEverntHandler.java
>  - HistoryFileManager.java
> It would be good to re-review and patch this if needed.

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