Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/5732
Manually merged in f3a519712fb31f7b71181e876c3c3d5fff08eb71
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Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/5732
@StephanEwen Yes, I think this should go into 1.5.0 because it fixes
potential (and real) problems. And yes, I wasn't suggesting to remove
`initializeSerializerUnlessSet(ExecutionConfig)` now, but
Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/5732
Concerning guarding the test assumptions: I think it is fine, because if
the KryoSerializer is not duplicating properly any more (assumption violated),
the test will also fail. (The problematic
