Github user giwa commented on the pull request:
https://github.com/apache/spark/pull/2538#issuecomment-56942157
@davies @JoshRosen
Is there any idea about how to kill callback server after an error is
happened?
I tried signal and atexit to call gateway._shutdown_callback_server()
This would be a critical trouble for CI. Test cases for streaming get error
because callback server port is occupied by previous thread.
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