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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-6044) Fully qualified intermediate done directory will break per-user dir creation on Windows
Date Thu, 21 Aug 2014 21:36:13 GMT
Zhijie Shen created MAPREDUCE-6044:
--------------------------------------

             Summary: 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


After MAPREDUCE-6032, the string of the intermediate done dir will be a fully qualified path.

The following code in JobHistroyUtils 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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