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https://issues.apache.org/jira/browse/MAPREDUCE-5222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656836#comment-13656836
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Vinod Kumar Vavilapalli commented on MAPREDUCE-5222:
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No, wait. Too fast! I was just asking what happens to ClassNotFoundException :)
Digged through the code, and figured it out. That will get wrapped into
UndeclaredThrowableException inside UserGroupInformation.doAs().
I just saw 0.23, and that doesn't have ClassNotFoundException, so adding this
will break 0.23 which we should try to avoid where-ever possible.
Deleting this exception will still be binary compatible, so I am going ahead
with your earlier patch.
> Fix JobClient incompatibilities with MR1
> ----------------------------------------
>
> Key: MAPREDUCE-5222
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5222
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Affects Versions: 2.0.4-alpha
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Attachments: mr-5222-2.patch, mr-5222-3.patch, mr-5222.patch,
> mr-5222.patch, mr-5222-rte.patch
>
>
> JobClient is missing the following two public methods we need to add for
> binary compatibility:
> # static isJobDirValid(Path, FileSystem)
> # Path getStagingAreaDir()
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