On Wed, 2006-08-30 at 15:10 -0700, [EMAIL PROTECTED] wrote: > Hello Mongrel gurus! > > > We are about to deploy our Rails application to production, and even > though the last couple of weeks of testing went really well, today we > are seeing a new critical issue - the browser just hangs sometimes > trying to load a page. When this happens, it seems that one or more of > the mongrel_rails processes is hanging and not responding, while > others are (so depending on which process the request is routed to, > the page loads or not). The only remedy from this point onward > appears to be brutal kill and restart of mongrel processes. >
Ah, you might be hitting the CLOSE_WAIT bug. This makes me think more and more that Apache is doing something funky. This bug and a 99% CPU bug is driving down right insane since I can't replicate it to save my life. I've got mongrel serving ISO images to an RFuzz script that randomly closes sockets and does nasty requests while thrashing mongrel with httperf with a short timeout. Nothing. Not even one CLOSE_WAIT socket, no memory leaks (anymore), and no CPU thrashing. It's really driving me nuts. What I've done is created a special "debug version" of the mongrel pre-release that I'd like you to run. Here's what you do: 1) download http://www.zedshaw.com/mongrel-0.3.13.4.gem 2) install: gem install mongrel-0.3.13.4.gem 3) start your app just like it is. 4) Hit mongrels with USR1: killall -USR1 mongrel_rails 5) Let mongrel run until it dies horribly. 6) Just before you kill -9 mongrel, run: lsof -i -P | grep CLOSE_WAIT > close_wait.log 7) Stop mongrel and send me log/mongrel.log and close_wait.log to zedshaw at zedshaw.com. Hopefully I can nail this for the next release. The CLOSE_WAIT used to be really bad but I cut it down quite a bit, so it should take longer to detroy it. Also make sure to tell me if the CPU usage for mongrel is above 90% (it's pegged). Thanks for the help. -- Zed A. Shaw http://www.zedshaw.com/ http://mongrel.rubyforge.org/ http://www.lingr.com/room/3yXhqKbfPy8 -- Come get help. _______________________________________________ Mongrel-users mailing list [email protected] http://rubyforge.org/mailman/listinfo/mongrel-users
