Why uWSGI emperor keeps killing workers?

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http://serverfault.com – I'm new to using uWSGI. Can someone explain the process of spawning and respawning workers? Why does this happen? And in my uWSGI logs, I keep seeing this message brutally killing workers. And then they re-spawn. I have set max number of requests to handle as 5000. But the respawning happens even before that. And as an extra info, I use uWSGI in emperor mode. (HowTos)