GitHub user markhamstra opened a pull request:
https://github.com/apache/spark/pull/16065
[SPARK-17064][SQL] Changed ExchangeCoordinator re-partitioning to avoid
additional data â¦
## What changes were proposed in this pull request?
Re-partitioning logic in ExchangeCoordinator changed so that adding another
pre-shuffle partition to the post-shuffle partition will not be done if doing
so would cause the size of the post-shuffle partition to exceed the target
partition size.
## How was this patch tested?
Existing tests updated to reflect new expectations.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/markhamstra/spark SPARK-17064
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16065.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 #16065
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commit 561fcf67bd3c1541352b00f33981a44fa58a6ccc
Author: Mark Hamstra <markhams...@gmail.com>
Date: 2016-11-29T20:34:03Z
Changed ExchangeCoordinator re-partitioning to avoid additional data skew
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