Kill process on a given port prior to running a flask app

Asked Feb 01 '20 at 19:36

Active Feb 01 '20 at 19:36

Viewed 1,440 times

I want to kill anything on a given port (i.e. 5000) prior to launching a flask application. Here is what I have so far:

In app.py:

if __name__ == "__main__":

    os.system('./kill.sh')

    app.run(host="0.0.0.0", debug=True)

In kill.sh:

lsof -ti:5000 | xargs kill -9

If I run kill.sh in terminal everything gets killed on port 5000. So I know that works. However when I run app.py flask starts but THEN gets killed by kill.sh. So it seems that os.system is not waiting to finish before executing app.run. How can I get it to wait?

asked Feb 01 '20 at 19:36

MoreScratch

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This might help - https://stackoverflow.com/questions/8953119/python-waiting-for-external-launched-process-finish – lawful_neutral Feb 01 '20 at 19:40
I could not reproduce this problem, I set my `host` and `port` both in `app.run` – ksha Feb 01 '20 at 20:02
I should specify that I am running in a virtualenv on Mac. – MoreScratch Feb 01 '20 at 20:50

Kill process on a given port prior to running a flask app

0 Answers0