myui opened a new pull request #182: [HIVEMALL-236] to_json/from_json cause KryoException/NullPointerException with ArrayList due to Kryo bug URL: https://github.com/apache/incubator-hivemall/pull/182 ## What changes were proposed in this pull request? Avoid NPE in Kryo serialization of List object created by `Arrays.asList`. ## What type of PR is it? Bug Fix ## What is the Jira issue? https://issues.apache.org/jira/browse/HIVEMALL-236 ## How was this patch tested? unit tests ## Checklist (Please remove this section if not needed; check `x` for YES, blank for NO) - [x] Did you apply source code formatter, i.e., `./bin/format_code.sh`, for your commit? - [ ] Did you run system tests on Hive (or Spark)?
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