Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/1913#issuecomment-218483592
Thanks for for your remarks. Instead of serializing/deserializing parts of
the `ExecutionConfig` whenever the usercode class loader needs to be passed, I
would like to serialize/deserialize the entire `ExecutionConfig`. This makes
everything explicit wherever the config is used. Plus, we create an explicit
copy of the config upon submission, regardless of the Akka object reuse mode.
The PojoSerializer will just keep a regular copy of the ExecutionConfig because
we always have the user code class loader available then.
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