Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/3548#issuecomment-65285340
I'm going to close this for now in favor of Mark's patch (#3550). There
are a couple of ideas here that might be useful for future improvements to this
code (including factoring out the policy into a separate file for easier
testing, which would be important if we added features like timeout-based host
blacklisting), but I agree that this PR is more complex than we need for a
narrow fix for this bug.
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