Strange quit behavior

Eric Wong normalperson at
Tue Aug 2 17:54:12 EDT 2011

Alex Sharp <ajsharp at> wrote:
> > I've found that it's very unreliable for quitting / terminating
> > unicorn and restarting with new code. When doing rapid deployments
> > particularly, i've found that i have to go in and kill -9 the master
> > process, and start again.
> We've noticed some of this behavior as well. We've seen the new master
> start spinning and consume 100% cpu (according to top). The old master
> and workers are still running and working, but the new master just
> hangs, and we have to kill -9.

Can you try to strace (or equivalent) the old master to see what's using
100% CPU?

Eric Wong

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