while MM restarting , Unable to cancel orders

2018-09-20 19:01:43,742 - INFO - ws_thread - Got all market data. Starting. 2018-09-20 19:01:43,742 - INFO - market_maker - Using symbol XBTUSD. 2018-09-20 19:01:43,743 - INFO - market_maker - Order Manager initializing, connecting to BitMEX. Live run: executing real trades. Traceback (most recent call last): File "marketmaker", line 4, in market_maker.run() File "/root/mm/market_maker/market_maker.py", line 543, in run om = OrderManager() File "/root/mm/market_maker/market_maker.py", line 217, in init self.instrument = self.exchange.get_instrument() File "/root/mm/market_maker/market_maker.py", line 133, in get_instrument return self.bitmex.instrument(symbol) File "/root/mm/market_maker/bitmex.py", line 68, in instrument return self.ws.get_instrument(symbol) File "/root/mm/market_maker/ws/ws_thread.py", line 77, in get_instrument raise Exception("Unable to find instrument or index with symbol: " + symbol) Exception: Unable to find instrument or index with symbol: XBTUSD 2018-09-20 19:01:43,744 - INFO - market_maker - Shutting down. All open orders will be cancelled. 2018-09-20 19:01:43,744 - INFO - market_maker - Resetting current position. Canceling all existing orders. 2018-09-20 19:01:43,744 - INFO - market_maker - Unable to cancel orders: Unable to find instrument or index with symbol: XBTUSD

in the bitmex.py, the function "exit" has handled this Excepttion like this:

 def exit(self):
        logger.info("Shutting down. All open orders will be cancelled.")
        try:
            self.exchange.cancel_all_orders()
            self.exchange.bitmex.exit()
        except errors.AuthenticationError as e:
            logger.info("Was not authenticated; could not cancel orders.")
        except Exception as e:
            logger.info("Unable to cancel orders: %s" % e)

        sys.exit()

I think it should go to the sys.exit() but it seems it came into a infinite loop. How should I do?

BitMEX / sample-market-maker

while MM restarting , Unable to cancel orders #160