Github user yanghua commented on the issue:
https://github.com/apache/flink/pull/5573
@GJL thanks for your guidance!
@aljoscha and @tillrohrmann I have refactored this issue, remained the
`getAccumulators` method created a `getSerializedAccumulators` method to return
the serialized accumulators in `ClusterClient`. And override
`getSerializedAccumulators` in `RestClusterClient`. For `JobAccumulatorsInfo`,
I also remained `UserTaskAccumulator` and just added a new property for
serialized accumulators. Please review, thanks.
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