Github user zsxwing commented on a diff in the pull request: https://github.com/apache/spark/pull/10579#discussion_r48990874 --- Diff: python/pyspark/context.py --- @@ -54,6 +54,64 @@ } +class Py4jCallbackConnectionCleaner(object): + + """ + A cleaner to clean up callback connections that are not closed by Py4j. See SPARK-12617. + It will scan all callback connections every 30 seconds and close the dead connections. + """ + + def __init__(self, gateway): + self._gateway = gateway + self._stopped = False + self._timer = None + self._lock = RLock() + + def start(self): + if self._stopped: + return + + def clean_closed_connections(): + from py4j.java_gateway import quiet_close, quiet_shutdown + + callback_server = self._gateway._callback_server + with callback_server.lock: --- End diff -- Sorry that I didn't notice that only Streaming uses the callback server. I sent #10621 to fix it.
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