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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2006/03/23 19:42:21 UTC

[jira] Resolved: (HADOOP-52) mapred input and output dirs must be absolute

     [ http://issues.apache.org/jira/browse/HADOOP-52?page=all ]
     
Doug Cutting resolved HADOOP-52:
--------------------------------

    Resolution: Fixed

I have committed this.  Thanks for adding unit tests! I had to add a Thread.sleep(1000) to the dfs test code before the tests would pass, to give the datanode a chance to introduce itself to the namenode before the client code started using the fs.  Perhaps this is just masking a bug.  Perhaps DFSClient should sleep and retry when NameNode.create() throws an exception?

> mapred input and output dirs must be absolute
> ---------------------------------------------
>
>          Key: HADOOP-52
>          URL: http://issues.apache.org/jira/browse/HADOOP-52
>      Project: Hadoop
>         Type: Bug
>   Components: mapred
>     Versions: 0.1
>     Reporter: Doug Cutting
>     Assignee: Owen O'Malley
>      Fix For: 0.1
>  Attachments: cwd.patch, cwd2.patch, cwd3.patch
>
> DFS converts relative pathnames to be under /user/$USER.  But MapReduce jobs may be submitted by a different user than is running the jobtracker and tasktracker.  Thus relative paths must be resolved before a job is submitted, so that only absolute paths are seen on the job tracker and tasktracker.  I think the simplest way to fix this is to make JobConf.setInputDir(), setOutputDir(), etc. resolve relative pathnames. 

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