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https://issues.apache.org/jira/browse/MAPREDUCE-1317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hong Tang updated MAPREDUCE-1317:
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Status: Open (was: Patch Available)
I spoke too soon. The cache needs to be properly synchronized because although
we expect LoggedLocation objects are created through JSON library and should be
read only afterwards, the cache may be accessed concurrently, and thus should
be properly synchronized.
Also found a few other minor improvements that I should incorporate.
With these, i think we also need to add a unit test to ensure the code runs
properly with multiple threads.
> Reducing memory consumption of rumen objects
> --------------------------------------------
>
> Key: MAPREDUCE-1317
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1317
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Hong Tang
> Assignee: Hong Tang
> Fix For: 0.21.0, 0.22.0
>
> Attachments: mapreduce-1317-20091218.patch
>
>
> We have encountered OutOfMemoryErrors in mumak and gridmix when dealing with
> very large jobs. The purpose of this jira is to optimze memory consumption of
> rumen produced job objects.
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