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https://issues.apache.org/jira/browse/MAPREDUCE-2961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-2961:
-----------------------------------------------
Status: Patch Available (was: Open)
For very large clusters, one can up the limit(default 500) to increase
scalability via an expert-level, non-documented configuration.
The default stack-size for a thread is 500K, so given 2GB default vmem for AM,
default upper limit of 500 should be fine.
> Increase the default threadpool size for container launching in the
> application master.
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-2961
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2961
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Mahadev konar
> Assignee: Vinod Kumar Vavilapalli
> Priority: Blocker
> Fix For: 0.23.0
>
> Attachments: MAPREDUCE-2961-20110923.1.txt,
> MAPREDUCE-2961-20110923.txt, MAPREDUCE-2961.patch, MAPREDUCE-2961.patch
>
>
> Currently the default threadpool size is 10 for launching containers in
> ContainerLauncherImpl. We should increase that to 100 for a reasonable
> default, so that container launching is not backed up by a small thread pool
> size.
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