how to debug when flask blocking

Question

I was running flask in a public_ip server(with some users)
run command is

(host='0.0.0.0', port=80, debug=True)

but flask server blocking somewhere one hour ago (the log show last request is one hour before) so how can I debug on it?(figure out it's blocking on which python line?)
I have tried

gdb python3.4-dbg pid,but my flask app can't run by python3.4-dbg,for

 from PIL import _imaging as core
ImportError: cannot import name '_imaging'

Woot4Moo · Accepted Answer · 2015-12-01 14:25:18Z

1

I believe the command is:

gdb -p pid

to attach to a running process.

answered Dec 1, 2015 at 14:25

Woot4Moo

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W G · Accepted Answer · 2015-12-01 15:34:56Z

1

oh,I find a way
after install python-dbg
use gdb python pid to attach flask
and use py-bt py-list py-locals to check the blocking stack

answered Dec 1, 2015 at 15:34

W G

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