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From "Dave Beech (JIRA)" <>
Subject [jira] [Commented] (MRUNIT-161) some distributed cache apis not working - JobContext getCacheArchives()
Date Mon, 26 Nov 2012 11:48:58 GMT


Dave Beech commented on MRUNIT-161:

the getLocal* methods are what the user would call in a mapper or reducer class to access
the cache files that have been "localized". That's to say, copied to local disk into the task's
working area by the mapreduce framework. 

We do set the "local" files in mrunit - it's done in TestDriver's initDistributedCache method.

I'll take a look at the patch later - thanks Brock. 
> some distributed cache apis not working - JobContext getCacheArchives()
> -----------------------------------------------------------------------
>                 Key: MRUNIT-161
>                 URL:
>             Project: MRUnit
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>            Reporter: Patrick Hunt
>            Priority: Blocker
>             Fix For: 1.0.0
>         Attachments: MRUNIT-161-0.patch
> I'm using the new MRUnit method withCacheArchive available in 1.0.0.
> DistributedCache.getLocalCacheArchives(conf) returns a non-empty array, however
> org.apache.hadoop.mapreduce.JobContext.getCacheArchives()
> in the mapper returns null. It seems that the context mock doesn't have these methods
> I'm using hadoop2, where getLocalCacheArchives is listed as deprecated.

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