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websockify
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Handle SIGCHLD properly for multiprocessing 

This commit should fix #101 by enabling a special SIGCHLD
handler for when multiprocessing is in use.  The handler
simply calls `multiprocessing.active_children()` (which in
turn calls `_cleanup()`) upon receiving a SIGCHLD.  Now,
the `fallback_SIGCHLD` is only called when `multiprocessing`
is not in use.  See also #95.
This commit is contained in:
Solly Ross 2013-10-21 16:50:52 -04:00
parent a61ae52610
commit 53f1f1989e
1 changed files with 10 additions and 1 deletions
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11
websockify/websocket.py
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@ -696,6 +696,9 @@ Sec-WebSocket-Accept: %s\r
def terminate(self):
raise self.Terminate()
def multiprocessing_SIGCHLD(self, sig, stack):
self.vmsg('Reaing zombies, active child count is %s', len(multiprocessing.active_children()))
def fallback_SIGCHLD(self, sig, stack):
# Reap zombies when using os.fork() (python 2.4)
self.vmsg("Got SIGCHLD, reaping zombies")
@ -796,7 +799,13 @@ Sec-WebSocket-Accept: %s\r
}
signal.signal(signal.SIGINT, self.do_SIGINT)
signal.signal(signal.SIGTERM, self.do_SIGTERM)
signal.signal(signal.SIGCHLD, self.fallback_SIGCHLD)
if not multiprocessing:
# os.fork() (python 2.4) child reaper
signal.signal(signal.SIGCHLD, self.fallback_SIGCHLD)
else:
# make sure that _cleanup is called when children die
# by calling active_children on SIGCHLD
signal.signal(signal.SIGCHLD, self.multiprocessing_SIGCHLD)
last_active_time = self.launch_time
try: