Github user tzulitai commented on the issue: https://github.com/apache/flink/pull/5364 @aljoscha @zentol could you have another quick look at commit 8882fb7? That commit extends `KeyedComplexChainTest`, `ChainBreakTest`, `ChainLengthIncreaseTest`, ... etc. also for 1.4. Once that is good, I'll merge this to `master` and `release-1.4`.
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