Github user squito commented on the issue:
https://github.com/apache/spark/pull/15249
@mridulm we had considered that approach earlier on as well -- I don't
think it works because you can also have resources which are not totally
broken, but are flaky for a long period of time. Simplest example is one bad
disk out of many; some tasks may succeed though a bunch will fail. I've seen
users hit this. But could be even more nuanced even, eg. a bad sector, flaky
network connection, etc.
In those cases, its intentional that in this implementation, one success
does *not* un-blacklist anything.
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