Github user rtudoran commented on the issue:
https://github.com/apache/flink/pull/3641
@fhueske
Based on the discussions on the PR this commit includes:
-an implementation based on onTimer in which multiple events arriving in
the same proctime would get the same accumulator values
-a removal of the ITCase tests
-a consolidation of the tests done based on the harness framework for
proctime
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