pnowojski commented on issue #8708: [FLINK-12816][streaming] set maxParallelism to 1 when DataStreamSource is not isParallel URL: https://github.com/apache/flink/pull/8708#issuecomment-505777251 As you can see there are related test failures caused by this change. One coming from `libraries` is benign. However this change brakes a savepoint restoration compatibility. As far as I know, there is some check somewhere, that ensures (for good reasons) that `maxParallelism` of the current job and of the savepoint from which we are restoring is the same. I'm pretty sure that we can not fix this that simply as this PR wants to do it. It also brings me a question, whether this change is worth the effort. Could you explain what exactly are you trying to improve/solve here?
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