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https://issues.apache.org/jira/browse/HBASE-8158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620011#comment-13620011
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Nick Dimiduk commented on HBASE-8158:
-------------------------------------
Further development when into this patch than in the initial version on trunk.
Notably, the precise order of class look-up for jar discovery is eventually
different on this ticket than what went into trunk, hence the parity patch.
Trouble is, JarFinder isn't actually provided by released hadoop yet, on any
version. It might be on the classpath in a test jar, but not in a production
deployment. IMHO, the reflection code should not have been added as it was,
because it was a work-around for a broken test environment.
We now have a legitimate use-case for this same code-path, hence it gaining
some new attention.
I'll take a look at the hadoop-compat modules on 0.95/trunk and see if I can
make sense of a variation, update the parity patch accordingly. The 0.94 patch
still applies. We'll still need to ship the backported JarFinder for 1.x
hadoops and, unless HADOOP-9426 squeezes in soon, for early releases of the 2.x
line as well.
> Backport HBASE-8140 "TableMapReduceUtils#addDependencyJar fails when nested
> inside another MR job"
> --------------------------------------------------------------------------------------------------
>
> Key: HBASE-8158
> URL: https://issues.apache.org/jira/browse/HBASE-8158
> Project: HBase
> Issue Type: Bug
> Components: mapreduce
> Affects Versions: 0.94.7
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
> Attachments: 8158-port-jarfinder-0.94.patch,
> 8158-port-jarfinder-0.94.patch, 8158-port-jarfinder-0.94.patch,
> 8158-port-jarfinder-0.94.patch, 8158-port-jarfinder-0.94.patch,
> 8158-trunk-parity.patch
>
>
> Assess the stability of the JarFinder util class from Hadoop-2, as a
> candidate for backporting to 0.94.
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