GitHub user 10110346 opened a pull request:
https://github.com/apache/spark/pull/22754
[CORE][MINOR]The disk write buffer size must be greater than 12
## What changes were proposed in this pull request?
In `UnsafeSorterSpillWriter.java`, when we write a record to a spill file
wtih ` void write(Object baseObject, long baseOffset, int recordLength, long
keyPrefix)`, `recordLength` and `keyPrefix` will be written the disk write
buffer first, and these will take 12 bytes, so the disk write buffer size must
be greater than 12.
## How was this patch tested?
Existing UT in `UnsafeExternalSorterSuite`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/10110346/spark diskWriteBufferSize
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22754.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 #22754
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commit dfc4b65088602ee45e0babe22e64e205fab3e82b
Author: liuxian <liu.xian3@...>
Date: 2018-10-17T06:03:00Z
fix
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