On Jul 17, 2012, at 7:56 AM, Mark McCraw wrote: > > On Jul 16, 2012, at 10:05 PM, Eric Wong wrote: > >> Mark Mccraw <mark.mcc...@sas.com> wrote: >>> Hi There! >>> >>> I'm having a devil of a time figuring out a weird issue I'm running >>> into. I have unicorn configured to start 4 worker processes, and that >>> works great. However, when it's time to cycle the app, everything >>> goes haywire. By trial and error, I have narrowed it down to this: >>> sending any signal to the master process other than SIGKILL fails >>> miserably. No new master process is created, as described in the >>> documentation, nothing happens to the existing workers, nothing gets >>> written to any log, and if I run top -u, I can see that very quickly >>> the master ramps up to 100% CPU utilization. This happens if I run >>> 'kill -HUP <master pid>', 'kill -USR2 <master pid>', even 'kill -QUIT >>> <master pid>'. >> >> This sounds like a Ruby/FreeBSD bug we've seen before. My script >> in http://mid.gmane.org/20120201181445.ga31...@dcvr.yhbt.net should >> reproduce the issue w/o unicorn. > > You are absolutely correct! Your script replicates the problem perfectly. > >>> ruby 1.9.3p0 (2011-10-30 revision 33570) [amd64-freebsd9] >> >> I think this is a Ruby bug that was fixed in 1.9.3-p30 according to >> naruse: >> http://mid.gmane.org/cak6hhsppwvpijwlyzmwckueydt5szrogv6adxkgreht3alf...@mail.gmail.com >> >> Since 1.9.3 p194 is the latest, can you try that out and confirm the >> fix? I don't remember the other bug reported confirmed this issue was >> fixed by upgrading Ruby. > > We're upgrading now to see what happens. I'm so glad you knew about this. > There's no telling how long it would have taken me to question the ruby > interpreter implementation, and > since it's FreeBSD, I never would have found it by googling. > Thanks for hours (days?) of my life back. > > Mark >
Just to follow up and close out the thread - Eric's recollection was spot on. We upgraded ruby on our FreeBSD server to the latest thing, and the problem completely disappeared. Thanks again! _______________________________________________ Unicorn mailing list - mongrel-unicorn@rubyforge.org http://rubyforge.org/mailman/listinfo/mongrel-unicorn Do not quote signatures (like this one) or top post when replying
