Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16263#discussion_r92912335
--- Diff: python/pyspark/rdd.py ---
@@ -2349,7 +2352,12 @@ def toLocalIterator(self):
"""
with SCCallSiteSync(self.context) as css:
port =
self.ctx._jvm.PythonRDD.toLocalIteratorAndServe(self._jrdd.rdd())
- return _load_from_socket(port, self._jrdd_deserializer)
+ # We set a timeout for connecting socket. The connection only
begins when we start
+ # to consume the first element. If we do not begin to consume the
returned iterator
+ # immediately, there will be a failure.
+ iter = _load_from_socket(port, self._jrdd_deserializer)
--- End diff --
It is.
> socket.close()
> Close the socket. All future operations on the socket object will fail.
The remote end will receive no more data (after queued data is flushed).
Sockets are automatically closed when they are garbage-collected.
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