Github user guoxu1231 commented on the pull request:
https://github.com/apache/spark/pull/10464#issuecomment-167760455
@srowen, thanks for the review. I combined the the resource release logic
from finally block and onStop(), and use synchronized block to avoid possible
release conflicts with restart thread(almost impossible, but in case some very
rare circumstance).
Receiver usually keep running very long time, we must be very careful about
the resource creation and release. Thanks for the patient review scrowen :)
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