GitHub user sarutak opened a pull request:
https://github.com/apache/spark/pull/10381
[SPARK-12424][ML] The implementation of ParamMap#filter is wrong.
ParamMap#filter uses `mutable.Map#filterKeys`. The return type of
`filterKey` is collection.Map, not mutable.Map but the result is casted to
mutable.Map using `asInstanceOf` so we get `ClassCastException`.
Also, the return type of Map#filterKeys is not Serializable. It's the issue
of Scala (https://issues.scala-lang.org/browse/SI-6654).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sarutak/spark SPARK-12424
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10381.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 #10381
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commit 95e3ff27d9dfd242bce322d6b3b635eb7fea2a8d
Author: Kousuke Saruta <saru...@oss.nttdata.co.jp>
Date: 2015-12-18T15:33:44Z
Fixed ParamMap#filter to avoid ClassCastException and SI-6654
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