GitHub user wangjiaochun opened a pull request:
https://github.com/apache/spark/pull/23225
[MINOR][CORE]Don't need to create an empty spill file when memory has no
records
## What changes were proposed in this pull request?
If there are no records in memory, then we don't need to create an empty
temp spill file.
## How was this patch tested?
Existing tests
(Please explain how this patch was tested. E.g. unit tests, integration
tests, manual tests)
(If this patch involves UI changes, please attach a screenshot; otherwise,
remove this)
Please review http://spark.apache.org/contributing.html before opening a
pull request.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangjiaochun/spark ShufflSorter
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/23225.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 #23225
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commit 6f9dcee39131429d9b40df45229149ffdde4fdbd
Author: 10087686 <wang.jiaochun@...>
Date: 2018-12-05T07:52:55Z
"add if"
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