Github user kayousterhout commented on the pull request:
https://github.com/apache/spark/pull/3541#issuecomment-65138690
@aarondav no -- the idea with this was that eventually the blacklist
timeout will expire. When @mridulm originally added this feature, the
motivation described was: "The reason I had to initially look into the problem
was due to repeated task failures on an executor which was going to die anyway
(was in process of cleanup I believe when tasks getting assigned to it or some
such) : which killed our tasksets and so jobs." For that case, deadlock isn't
so much an issue -- although you're right that it could happen in other cases.
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