Github user zentol commented on the issue:
https://github.com/apache/flink/pull/4293
Given that enabling the cache doesn't appear to improve build times I
wouldn't enable it, especially since it does require more efforts for cleaning
up corrupted caches. It appears there are only downsides for us to enabling it.
If we don't cache artifacts across job we don't have to worry about fixing
corrupted artifacts, so that problem would be "solved".
The check is still useful though.
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