> Questions: > how to get debug output? > what it can be, why it hangs? > > If it hangs because all uWSGI processes and threads are busy the problem is on the Python site (you running Django?). Potential reasons include all threads are waiting for external network connection, somehow you eat all your database connections or file handles and new ones cannot be opened for new requests.
Take a thread dump from Python processes to see if Python is hanging somewhere: http://uwsgi-docs.readthedocs.org/en/latest/Tracebacker.html Use stats to monitor the situation and see what leads to hanging (effectively combine with monitoring and graph tool like Munin): http://uwsgi-docs.readthedocs.org/en/latest/StatsServer.html -- Mikko Ohtamaa http://opensourcehacker.com http://twitter.com/moo9000
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