Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/22179
@wangyum
I made a [PR](https://github.com/wangyum/spark/pull/9) to your branch.
Could you review and merge that? The content are the followings.
- Add a new test case for SPARK-23131 (Kryo raises StackOverflow during
serializing GLR model)
- Update your test case for SPARK-25176 (ClassCastException when
reading/writing a Map)
After merging the [PR](https://github.com/wangyum/spark/pull/9), please add
`[SPARK-25176]` after `[SPARK-23131]` because we have test cases. We can
resolve both issues under your name.
For the remaining SPARK-20389 (NegativeArraySizeException), there is no
response on JIRA. So, let's simply exclude it from this PR description because
we cannot claim that it's resolved.
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