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arbiter: Wait for all old workers to terminate on SIGHUP #3312

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arbiter: Wait for all old workers to terminate on SIGHUP #3312

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10 changes: 10 additions & 0 deletions gunicorn/arbiter.py
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Original file line number Diff line number Diff line change
Expand Up @@ -478,13 +478,23 @@ def reload(self):
# set new proc_name
util._setproctitle("master [%s]" % self.proc_name)

last_worker_to_kill = self.worker_age

# spawn new workers
for _ in range(self.cfg.workers):
self.spawn_worker()

# manage workers
self.manage_workers()

# wait for all old workers to be replaced
deadline = time.monotonic() + self.cfg.graceful_timeout
while time.monotonic() < deadline:
oldest_worker = list(self.WORKERS.values())[0].age
if oldest_worker > last_worker_to_kill:
break
time.sleep(0.1)

def murder_workers(self):
"""\
Kill unused/idle workers
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