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Posted to mapreduce-dev@hadoop.apache.org by "Jason Lowe (Created) (JIRA)" <ji...@apache.org> on 2012/03/08 16:39:58 UTC
[jira] [Created] (MAPREDUCE-3987) Reduce RM app memory footprint
once app has completed
Reduce RM app memory footprint once app has completed
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Key: MAPREDUCE-3987
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3987
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mrv2, resourcemanager
Affects Versions: 0.23.1
Reporter: Jason Lowe
The ResourceManager holds onto a configurable number of completed applications (yarn.resource.max-completed-applications, defaults to 10000), and the memory footprint of these completed applications can be significant. For example, the {{submissionContext}} in RMAppImpl contains references to protocolbuffer objects and other items that probably aren't necessary to keep around once the application has completed. We could significantly reduce the memory footprint of the RM by releasing objects that are no longer necessary once an application completes.
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