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Handle forking somewhat more safely

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Jonathan Mortensen 2020-12-04 18:37:24 -08:00 committed by GitHub
parent e85ef2298b
commit 5a2c8c6b04
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1 changed files with 21 additions and 0 deletions
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21
lib/pool.py
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@ -185,3 +185,24 @@ class ThreadedConnectionPool(AbstractConnectionPool):
self._closeall()
finally:
self._lock.release()
class MultiProcessThreadedConnectionPool(ThreadedConnectionPool):
def __init__(self, *args, **kwargs):
self.pid = os.getpid()
self.args = args
self.kwargs = kwargs
super().__init__(*args, **kwargs)
def getconn(self, *args, **kwargs):
current_pid = os.getpid()
if current_pid != self.pid:
super().__init__(*self.args, **self.kwargs)
self.pid = current_pid
return super().getconn(*args, **kwargs)
def putconn(self, *args, **kwargs):
current_pid = os.getpid()
if current_pid != self.pid:
raise Exception("Returned a connection to the pool that was acquired pre-fork. Don't use pre-fork connections post-fork.")
return super().putconn(*args, **kwargs)