Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/1643#discussion_r15602183
--- Diff: python/pyspark/daemon.py ---
@@ -50,6 +54,43 @@ def compute_real_exit_code(exit_code):
return 1
+def check_socket(sockets):
+ fds = [sock.fileno() for _, sock in sockets]
+ # poll all the sockets check if some of them were closed
+ avail_fds = select.select(fds, [], [], 1)[0]
+
+ for fd in avail_fds:
+ pid, sock = sockets[fds.index(fd)]
+ try:
+ n = sock.recv(1, socket.MSG_PEEK | socket.MSG_DONTWAIT)
--- End diff --
In most cases, there is no exception, recv() will return 0.
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