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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-449) MRAppMaster classpath not set properly for unit tests in downstream projects
Date Thu, 07 Mar 2013 19:50:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13596276#comment-13596276
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Siddharth Seth commented on YARN-449:
-------------------------------------

I tried the Hive tests a couple of days ago. Same problem as what Ted saw - i.e the MiniDFSCluster
error. That's an error before the MiniMRCluster is created in Hive. From looking at the Hive
unit test code, I exepct them to require similar changes to use the configuration provided
by the MiniMRCluster.

Does it make sense to include an additional method on the MiniClusters - something like {{getMinimalConfiguration()}}
- which would only include parameters required to talk to the cluster. This would allow downstream
projects to pull such configuration from MiniDFS, MiniMR, etc - and then build out a config
from all of these.
                
> MRAppMaster classpath not set properly for unit tests in downstream projects
> ----------------------------------------------------------------------------
>
>                 Key: YARN-449
>                 URL: https://issues.apache.org/jira/browse/YARN-449
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.0.3-alpha
>            Reporter: Siddharth Seth
>            Priority: Blocker
>         Attachments: hbase-7904-v3.txt, hbase-TestHFileOutputFormat-wip.txt, hbase-TestingUtility-wip.txt
>
>
> Post YARN-429, unit tests for HBase continue to fail since the classpath for the MRAppMaster
is not being set correctly.
> Reverting YARN-129 may fix this, but I'm not sure that's the correct solution. My guess
is, as Alexandro pointed out in YARN-129, maven classloader magic is messing up java.class.path.

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