[jira] [Commented] (MAPREDUCE-5558) Scheme for local file is lost when submitting mapreduce job using mapreduce API

["Junping Du (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14246826#comment-14246826 ] 

Junping Du commented on MAPREDUCE-5558:
---------------------------------------

Hive meet the similar problem when enable local mode and defaultFS is hdfs. The simple fix now has problem with adding schema of "hdfs://" to classpath which block most of mainstream cases for DistributedCache. 
[~yuzhihong@gmail.com], I will reopen it and take it over if you don't mind.

> Scheme for local file is lost when submitting mapreduce job using mapreduce API
> -------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5558
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5558
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.1.0-beta, 2.1.1-beta, 2.2.0
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Blocker
>         Attachments: mapreduce-5558.patch
>
>
> HBase snapshot export adds dependent jars (local files) through "tmpjars" config entry.
> When debugging HBASE-9687, we found that scheme for local file (file://) is lost by DistributedCache.addFileToClassPath() call in JobSubmitter.
> The root cause of this problem is that we are somehow losing "file://" from the uri. In the earlier code we were creating new Path object (new Path (newPath.toUri().getPath()) ) where as part of newPath.toUri().getPath() call we are losing the authority and scheme which are passed in.
> Thanks to Omkar and Vinod who helped debug this issue



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