GitHub user WeichenXu123 opened a pull request:
https://github.com/apache/spark/pull/15587
[SPARK-18051][Spark Core] fix bug of custom PartitionCoalescer causing
serialization exception
## What changes were proposed in this pull request?
mark `PartitionCoalescer` and `PartitionGroup` as Serializable.
## How was this patch tested?
Manual.(test code in jira [SPARK-18051])
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/WeichenXu123/spark fix_coalescer_bug
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15587.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 #15587
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commit 2d88eaa66795239008366d19f8137682db59182e
Author: WeichenXu <weichenxu...@outlook.com>
Date: 2016-10-21T15:27:38Z
update.
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