2021-02-26 17:28:56 tornado.application[713] [ERROR] Exception in callback functools.partial(<function wrap.<locals>.null_wrapper at 0xb48ae6a8>)
Traceback (most recent call last):
  File "/home/fermentrack/venv/lib/python3.7/site-packages/tornado/ioloop.py", line 605, in _run_callback
    ret = callback()
  File "/home/fermentrack/venv/lib/python3.7/site-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 548, in <lambda>
    self.io_loop.add_callback(lambda : self._handle_events(self.socket, 0))
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 458, in _handle_events
    zmq_events = self.socket.EVENTS
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/sugar/attrsettr.py", line 50, in __getattr__
    return self._get_attr_opt(upper_key, opt)
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/sugar/attrsettr.py", line 63, in _get_attr_opt
    return self.get(opt)
  File "zmq/backend/cython/socket.pyx", line 472, in zmq.backend.cython.socket.Socket.get
  File "zmq/backend/cython/socket.pyx", line 135, in zmq.backend.cython.socket._check_closed
zmq.error.ZMQError: Socket operation on non-socket
2021-05-11 01:58:40 tornado.application[370] [ERROR] Exception in callback functools.partial(<function wrap.<locals>.null_wrapper at 0xb5a20ed0>)
Traceback (most recent call last):
  File "/home/fermentrack/venv/lib/python3.7/site-packages/tornado/ioloop.py", line 605, in _run_callback
    ret = callback()
  File "/home/fermentrack/venv/lib/python3.7/site-packages/tornado/stack_context.py", line 277, in null_wrapper
    return fn(*args, **kwargs)
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 548, in <lambda>
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 458, in _handle_events
    return
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/sugar/attrsettr.py", line 50, in __getattr__
    def _get_attr_opt(self, name, opt):
  File "/home/fermentrack/venv/lib/python3.7/site-packages/zmq/sugar/attrsettr.py", line 63, in _get_attr_opt
  File "zmq/backend/cython/socket.pyx", line 472, in zmq.backend.cython.socket.Socket.get
  File "zmq/backend/cython/socket.pyx", line 135, in zmq.backend.cython.socket._check_closed
zmq.error.ZMQError: Socket operation on non-socket