I have a very strange issue going on that just started happening last week. I am running an apache/mongrel stack on a windows 2003 box connecting to a sql server 2005. Apache 2.2.3 Mongrel 1.1.5 Since last Thursday I have had 5 crashes where the mongrel service becomes unresponsive. If I restart the service all is fine. Nothing is being reported in the rails logs... But I did notice something in the mongrel logs. Each time it look like I get the following log entry: ** INT signal received. Wed Aug 13 15:01:20 -0500 2008: Reaping 103 threads for slow workers because of 'shutdown' Thread #<Thread:0x8553270 sleep> is too old, killing. Wed Aug 13 15:01:20 -0500 2008: Error calling Dispatcher.dispatch #<Mongrel::TimeoutError: Mongrel timed out this thread: shutdown> c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel.rb:221:in `process' c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel.rb:159:in `process_client' c:/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mswin32-60/bin/../lib/mongrel.rb:158:in `each' I have seen this pattern repeated for each of the crashes. I have 5 instances running and about 50 concurrent users who are banging away at this web application. Any advice or thoughts would be much appreciated. Thanks in advance
on 2008-08-13 23:45
on 2008-08-15 00:48
On Wed, Aug 13, 2008 at 11:45 PM, Chris Schmitt <firstname.lastname@example.org> wrote: > mongrel logs. > `process' > > Thanks in advance Hey Chris, I have seen this, but with mysql. When you try to stop the mongrel_service, mongrel is trying to stop all the threads that are pending, so that is what you see is being logged in the mongrel log. There are several ways to end having "stalled" threads, a few of them involves timeouts and disconnections from the database. You can check the docs about that here: http://mongrel.rubyforge.org/wiki/FAQ#WhydoIgetMyS... The other issue can be related to code that is being doing something wrong in some request and just never finish those. This FAQ section describe what to do on a *nix environment: http://mongrel.rubyforge.org/wiki/FAQ#WhydoesMongr... But since you're not there, you can: 1) remove and reinstall the mongrel_service adding the debugging option (-B or --debug) 2) Start the service 3) when you see it is staled, stop it and collect the log information to pinpoint which thread and which library break it.. Hope this help you, but without more information about your Rails version, Ruby version (and patchlevel) and some lirbaries involved I cannot comment further than that :-D Regards, -- Luis Lavena AREA 17 - Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. Douglas Adams
on 2008-08-15 16:19
Thanks Luis.. I will check those links out.