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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