GitHub user jerryshao opened a pull request:
https://github.com/apache/spark/pull/10376
[SPARK-12400][Shuffle] Avoid generating temp shuffle files for empty
partitions
This problem lies in `BypassMergeSortShuffleWriter`, empty partition will
also generate a temp shuffle file with several bytes. So here change to only
create file when partition is not empty.
This problem only lies in here, no such issue in `HashShuffleWriter`.
Please help to review, thanks a lot.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jerryshao/apache-spark SPARK-12400
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10376.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 #10376
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commit 7837b0601299da5ba42d45e5279b9c1449a7d619
Author: jerryshao <[email protected]>
Date: 2015-12-18T10:15:17Z
Avoid generating temp shuffle files for empty partitions
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