Github user zsxwing commented on the pull request: https://github.com/apache/spark/pull/11971#issuecomment-201703258 > LGTM but I wonder if just overriding Thread.run and making it final wouldn't be enough (the task to run would have to be passed as a Runnable). It would simplify the code a little bit and you wouldn't need to deal with reentrant calls, which the current code doesn't seem to need anyway. Could you clarify it? If overriding `run`, then the whole Thread will be uninterruptible and this is not what we want.
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