GitHub user vpchelko opened a pull request:
https://github.com/apache/spark/pull/16374
[SPARK-18925][STREAMING] Reduce memory usage of mapWithState
## What changes were proposed in this pull request?
Reduced memory usage of mapWithState by cleaning all 'oldRDDs' except
current and last checkpointed - overridden clearMetadata for
InternalMapWithStateDStream
## How was this patch tested?
Passed unit tests, manual tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vpchelko/spark spark-18925
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16374.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16374
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commit 3888e11f3fc040636fdddd25b54652694e007544
Author: Vladimir Pchelko <pche...@productengine.com>
Date: 2016-12-19T09:04:50Z
[SPARK-18925][STREAMING] Reduce memory usage of mapWithState
override clearMetadata for InternalMapWithStateDStream,
clear all oldRDDs except current and last checkpointed
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