4
  • Serving Flask app "server" (lazy loading)
    • Environment: production WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
    • Debug mode: on
    • Running on http://0.0.0.0:9002/ (Press CTRL+C to quit)
    • Restarting with stat
    • Debugger is active!
    • Debugger PIN: 314-390-242 Exception in thread Thread-1: Traceback (most recent call last): File "/home/user/Downloads/yes/envs/emotionservice/lib/python2.7/threading.py", line 801, in __bootstrap_inner self.run() File "/home/user/Downloads/yes/envs/emotionservice/lib/python2.7/threading.py", line 754, in run self.__target(*self.__args, **self.__kwargs) File "/home/user/Downloads/yes/envs/emotionservice/lib/python2.7/site-packages/werkzeug/serving.py", line 963, in inner fd=fd, File "/home/user/Downloads/yes/envs/emotionservice/lib/python2.7/site-packages/werkzeug/serving.py", line 803, in make_server raise ValueError("cannot have a multithreaded and multi process server.") ValueError: cannot have a multithreaded and multi process server.
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6

it solved. set threaded=True processes=1

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1

If you want to use flask in multiprocessing mode (processes > 1). include threaded=False, otherwise it throws same error.

app.run(host=addr, port=port, threaded=False, processes=50)

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