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I am using Flask to create a web service. I hope to restart it like every 30 minutes. Is that possible to do that and how can it be realized?

Meanwhile, I tried to use subprocess (popen) to start the flask web service, terminate it and start it again, but the server could not be shut down unless the whole program, where I call subprocess, is also down.

I would very appreciate if you could share your knowledge and experience regarding to this issue.

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    What do you actually want to do? Why do you want to restart it every 30 minutes? You could add a cronjob to handle this, but it sounds like you're doing something you don't need to do. Commented Jul 26, 2016 at 0:28
  • Some useful info here: stackoverflow.com/questions/6337119/… Commented Jul 26, 2016 at 0:34
  • I am using the web service to call an API where the login info seems to be expired in 30 minutes. After I manually shut the web service down and start it again, it works well as I want. It seems like cronjob is a promising solution, I will try it out. Commented Jul 26, 2016 at 0:55
  • Finally, I managed to use Popen to have flask as a subprocess, terminate it and restart it without any problem. The trick part is how to kill the flask cleanly. Commented Jul 28, 2016 at 18:47

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Flask web server is not supposed to serve production traffic. You should consider using some other service on top of WSGI protocol, such as gunicorn or uwsgi or apache mod_wsgi.

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