Traceback when stopping a kernel execution

[manuelma]

Almost systematically

Exception in thread Thread-20:
Traceback (most recent call last):
  File "/home/manuelma/miniconda3/envs/spinetoolbox/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/home/manuelma/miniconda3/envs/spinetoolbox/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/manuelma/Codes/spine/engine/spine_engine/spine_engine.py", line 390, in _execute_item_filtered
    item_success = item.execute(filtered_forward_resources, filtered_backward_resources)
  File "/home/manuelma/Codes/spine/items/spine_items/tool/executable_item.py", line 410, in execute
    return_code = self._tool_instance.execute()
  File "/home/manuelma/Codes/spine/items/spine_items/tool/tool_instance.py", line 157, in execute
    return self._console_execute()
  File "/home/manuelma/Codes/spine/items/spine_items/tool/tool_instance.py", line 167, in _console_execute
    ret = self.exec_mngr.run_until_complete()
  File "/home/manuelma/Codes/spine/engine/spine_engine/execution_managers.py", line 177, in run_until_complete
    returncode = self._do_run()
  File "/home/manuelma/Codes/spine/engine/spine_engine/execution_managers.py", line 183, in _do_run
    self._kernel_client.wait_for_ready(timeout=self._startup_timeout)
  File "/home/manuelma/miniconda3/envs/spinetoolbox/lib/python3.7/site-packages/jupyter_client/blocking/client.py", line 96, in wait_for_ready
    msg = self.shell_channel.get_msg(block=True, timeout=1)
  File "/home/manuelma/miniconda3/envs/spinetoolbox/lib/python3.7/site-packages/jupyter_client/blocking/channels.py", line 47, in get_msg
    ready = self.socket.poll(timeout)
  File "/home/manuelma/.local/lib/python3.7/site-packages/zmq/sugar/socket.py", line 702, in poll
    evts = dict(p.poll(timeout))
  File "/home/manuelma/.local/lib/python3.7/site-packages/zmq/sugar/poll.py", line 99, in poll
    return zmq_poll(self.sockets, timeout=timeout)
  File "zmq/backend/cython/_poll.pyx", line 143, in zmq.backend.cython._poll.zmq_poll
  File "zmq/backend/cython/_poll.pyx", line 123, in zmq.backend.cython._poll.zmq_poll
  File "zmq/backend/cython/checkrc.pxd", line 26, in zmq.backend.cython.checkrc._check_rc
zmq.error.ZMQError: Socket operation on non-socket

[manuelma]

This looks like it was solved by the above commit but the last sentence in that commit message makes me wonder. Let's keep it open until we have time to figure out things.