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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6044) Fully qualified intermediate done directory will break per-user dir creation on Windows
Date Fri, 22 Aug 2014 17:00:13 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14107082#comment-14107082
] 

Zhijie Shen commented on MAPREDUCE-6044:
----------------------------------------

Thanks for the review, [~cnauroth]! I'll go ahead to commit the patch.

> Fully qualified intermediate done directory will break per-user dir creation on Windows
> ---------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6044
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6044
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobhistoryserver
>    Affects Versions: 3.0.0, 2.6.0
>         Environment: Windows
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>         Attachments: MAPREDUCE-6044.1.patch
>
>
> After MAPREDUCE-6032, the string of the intermediate done dir will be a fully qualified
path.
> The following code in JobHistoryUtils tries to concat this path and user name to create
a per-user dir path, using File.separator as the seperator (on Windows, it is "\").
> {code}
>   public static String getHistoryIntermediateDoneDirForUser(Configuration conf) throws
IOException {
>     return getConfiguredHistoryIntermediateDoneDirPrefix(conf) + File.separator
>         + UserGroupInformation.getCurrentUser().getShortUserName();
>   }
> {code}
> Therefore, an intermediate done dir for user will become "hdfs://localhost:9201/mapred/history/done_intermediate\user".
With the scheme available in the path, Path class will not replace "\" with "/", and finally
FS cannot handle this path correctly: it will take "done_intermediateuser" as a single directory
name.



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