Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/305#issuecomment-70422236
I do not see how this can possibly work on a cluster... Everything is in
static variables (in the client) that do not get transferred via serialization
when moving the code to the cluster. Maybe `registeredSerializers` and
`registeredSerializerClasses` should not be static?
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