GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/19687
[SPARK-19644][SQL]Clean up Scala reflection garbage after creating Encoder
## What changes were proposed in this pull request?
Because of the memory leak issue in `scala.reflect.api.Types.TypeApi.<:<`
(https://github.com/scala/bug/issues/8302), creating an encoder may leak memory.
This PR adds `cleanUpReflectionObjects` to clean up these leaking objects
for methods calling `scala.reflect.api.Types.TypeApi.<:<`.
## How was this patch tested?
The updated unit tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-19644
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19687.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 #19687
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commit c03811ff006058987fa8d5fb9f7d097b9acc9ac5
Author: Shixiong Zhu <[email protected]>
Date: 2017-11-08T00:33:55Z
Clean up Scala reflection garbage after creating Encoder
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