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pyjanssen's Issues

MCM() crashes if single class is shared over multiple threads

For example, if I have a thread monitoring the position and another thread moves the positioner, in about 50% of cases this happens:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 217, in move
    return self._move(address,channel,direction,kwargs)
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 256, in _move
    str(self.step_size(address)),str(self.steps(address)))
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 82, in _run
    return self.__parse_reply(response,i)
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 102, in __parse_reply
    assert this_command_log['parameters'] == response.args
AssertionError
>>> Exception in thread Thread-359:
Traceback (most recent call last):
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\threading.py", line 917, in _bootstrap_inner
    self.run()
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "<stdin>", line 3, in thing
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 266, in get_position
    return self._run('POS',str(address),str(channel))['POS']
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 82, in _run
    return self.__parse_reply(response,i)
  File "C:\Users\wx18969\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyjanssen\janssen_mcm.py", line 99, in __parse_reply
    this_command_log = self.__command_log.pop(i)
KeyError: 1

First thoughts are that this appears to be caused by MCM getting a response from one subprocess it expects in another, which causes it to find a mismatch between the expected response and the actual response.

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