def start(self):
# this is pretty unfortunate, but we have to reset the adapter
# cache _before_ we fork on posix. libpq, but also any other
# adapters that rely on file descriptors, get really messed up if
# you fork(), because the fds get inherited but the state isn't
# shared. The child process and the parent might end up trying to
# do things on the same fd at the same time.
# Also for some reason, if you do this after forking, even without
# calling close(), the connection in the parent ends up throwing
# 'connection already closed' exceptions
cleanup_connections()
self.process.start()
self.state = TaskHandlerState.Running
super().start()
def adapter_management():
reset_adapters()
try:
yield
finally:
cleanup_connections()