Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/4944#issuecomment-81267408
I've updated this with a new commit that adds another layer of `try-catch`
blocks to handle errors when reading the status code. I also made a slight
change to how we handle 404 errors: we now attempt to close the error stream
and only call `disconnect()` as a last-resort in case the error stream cleanup
fails. This allows us to continue to benefit from HTTP keep-alive / persistent
connections even when errors occur (I verified this behavior using Wireshark)>
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