This experiment is to understand how uwsgi harakiri works with regards to multiple processes and multiple threads.
We'd like the signal (SIGSYS/31) to be caught by the application so that we can emit any cleanup logs/traces before the process is killed, to help us identify attributes about slow requests.
Running the example:
# Create a python 3.10 virtualenv and activate it
$ pip install -r requirements.txt
$ cd app
$ uwsgi --ini uwsgi.ini
Then in a browser, launch http://127.0.0.1:8000/slow/The sleep within the slow view is longer than the harakiri timeout, so we should consistently see a harakiri on that view.
Is the signal caught within the application and the log messages from the signal handler emitted?