UDP listeners leak.

[jrwren]

I noticed this using uwsgi to host our application. Now I do not think it is uwsgi related.

lsof -p <mypid> shows many UDP listeners

...
uwsgi_pyt 8855 myapp 1014u  IPv4           61164162      0t0      UDP *:37440
uwsgi_pyt 8855 myapp 1015u  IPv4           61164204      0t0      UDP *:50661
uwsgi_pyt 8855 myapp 1016u  IPv4           61165045      0t0      UDP *:59752
uwsgi_pyt 8855 myapp 1017u  IPv4           61164224      0t0      UDP *:49717
uwsgi_pyt 8855 myapp 1018u  IPv4           61164375      0t0      UDP *:46519
uwsgi_pyt 8855 myapp 1019u  IPv4           61164441      0t0      UDP *:47617
uwsgi_pyt 8855 myapp 1020u  IPv4           61165421      0t0      UDP *:50587
uwsgi_pyt 8855 myapp 1021u  IPv4           61165334      0t0      UDP *:48802
uwsgi_pyt 8855 myapp 1022u  IPv4           61165425      0t0      UDP *:40760
uwsgi_pyt 8855 myapp 1023u  IPv4           61165372      0t0      UDP *:47147
...

The per request StatsClient object may get garbage collected, but the socket listener resource is never cleaned up. This ultimately causes us to run out of file descriptors.

[pior]

Thanks for reporting!
I will take a look at this very soon!

[pior]

Fix by #2 and released in v0.3.1