Hi everyone. I would like to start the discussion thread for FLIP-317: Upgrade Kryo from 2.24.0 to 5.5.0 [1].
There is a pull-request associated with this linked in the FLIP. I'd particularly like to hear about: - Chesnay Schepler's request to consider removing Kryo serializers from the execution config. Is this a reasonable task to add into this FLIP? Is there consensus on how to resolve that? Would that be better addressed in a separate future FLIP after the Kryo upgrade FLIP is completed? - Backwards compatibility. The automated CI tests have a lot of backwards compatibility tests that are passing. I also wrote a Flink application with keyed state using custom Kryo v2 serializers and then an upgraded version with both Kryo v2 and Kryo v5 serializers to stress test the upgrade process. I'd like to hear about additional scenarios that need to be tested. - Is this worth pursuing or is the Flink project looking to go in a different direction? I'd like to do some more work on the pull request if this is being seriously considered for adoption. I'm looking forward to hearing everyone's feedback and suggestions. Thank you, Kurt [1] https://cwiki.apache.org/confluence/display/FLINK/FLIP-317%3A+Upgrade+Kryo+from+2.24.0+to+5.5.0
