Github user ifndef-SleePy commented on the issue:
https://github.com/apache/flink/pull/3487
Thank you, Stephan and zentol.
Good question and suggestion. I didn't consider it too much for batch jobs.
Also I think it's a bad idea that naming the variable "numberOfKeyGroups"
in TaskInfo. Keeping max-parallelism is better. It's more common and makes much
more sense for other scenarios.
I will make sure it can work with batch jobs, and update this PR later.
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