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https://issues.apache.org/jira/browse/MAPREDUCE-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661415#comment-13661415
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Xi Fang commented on MAPREDUCE-5224:
------------------------------------

Thanks Ivan for the comments. That is of great help! I will check my code:)
                
> JobTracker should allow the system directory to be in non-default FS
> --------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5224
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5224
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Xi Fang
>            Assignee: Xi Fang
>            Priority: Minor
>             Fix For: 1-win
>
>         Attachments: MAPREDUCE-5224.2.patch, MAPREDUCE-5224.patch
>
>
>  JobTracker today expects the system directory to be in the default file 
> system
>         if (fs == null) {
>           fs = mrOwner.doAs(new PrivilegedExceptionAction<FileSystem>() {
>             public FileSystem run() throws IOException {
>               return FileSystem.get(conf);
>           }});
>         }
> ...
>   public String getSystemDir() {
>     Path sysDir = new Path(conf.get("mapred.system.dir", 
> "/tmp/hadoop/mapred/system"));  
>     return fs.makeQualified(sysDir).toString();
>   }
> In Cloud like Azure the default file system is set as ASV (Windows Azure Blob 
> Storage), but we would still like the system directory to be in DFS. We 
> should change JobTracker to allow that.

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