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 it seemed like a good place to mention it. ð
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