runserver goes into an infinite loop after first request on OSX.

[loic84]

The following snippet causes an infinite loop and its customary 100% CPU usage:

events = kqueue.control([], 1)
# After a request, reload the set of watched files.
if len(events) == 1 and events[0].ident == watcher.fileno():
    continue

This is because the event isn't currently cleared, so once the condition becomes True, it remains so indefinitely.

[loic84]

PR ​https://github.com/django/django/pull/2016.

[loic84]

If someone with a mac would like to test that's actually doing the right thing, ​https://gist.github.com/7752939 would help.

1. kqueue_code_changed should print each time a reload is performed.
2. update_watch should print after each request (handler for the request_finished signal).
3. request_finished should print after update_watch, indicating that the signal handler did wake up the kqueue.

Most importantly, request_finished should print only once after the request, and not repeat itself indefinitely.

[Aymeric Augustin]

I fail at man kqueue :(

[Loic Bistuer <loic.bistuer@…>]

In 9ccde8cfafda03c961343b4523ac035428c4ff25:

Fixed #21545 -- autoreload kqueue events weren't cleared which caused an infinite loop.

[Aymeric Augustin <aymeric.augustin@…>]

In 643180b5d253e2cbc9cfccccafa5b1e35dcf5583:

Merge pull request #2016 from loic/ticket21545

Fixed #21545 -- autoreload kqueue events weren't cleared which caused an infinite loop.