Mongrel crashing problem

Server Mongrel
1

Hi Everyone,

Wondering if anyone has insight into my mongrel crashing problem before
I dig deeper with gdb etc. Most of the crashes seem to be in
connection_pool.rb (see below). I’ve got 4 of them running and a mongrel
crashes about 1-3 times a day. Load varies from light (8 hits/min) to
light-moderate (60 hits/min)… crash frequency seems to be directly
related to load.

I’m running a Rails 2.3.2 app under mongrel 1.1.5 (cluster 1.0.5) on
Linux w/ ruby 1.8.7 (2009-04-08 patchlevel 160) [powerpc64-linux].
Backend is MySQL 5.0.18 on a shared host.

Here is what I have in my mongrel logs… seems like some of the crashes
are not logged:

mongrel.30001.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:
[BUG] Segmentation fault
mongrel.30001.log:activerecord-2.3.2/lib/active_record/associations.rb:1859:
[BUG] Segmentation fault
mongrel.30002.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:351:
[BUG] Segmentation fault
mongrel.30002.log:activerecord-2.3.2/lib/active_record/associations/association_proxy.rb:213:
[BUG] Segmentation fault
mongrel.30003.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:
[BUG] Segmentation fault
mongrel.30003.log:activerecord-2.3.2/lib/active_record/attribute_methods.rb:345:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/attribute_methods.rb:345:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:349:
[BUG] Segmentation fault
mongrel.30004.log:actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/utils.rb:89:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:351:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:351:
[BUG] Segmentation fault
mongrel.30004.log:activerecord-2.3.2/lib/active_record/attribute_methods.rb:345:
[BUG] Segmentation fault

Thanks!
- nick

2

Looks like a Ruby bug, not a Mongrel issue.

Try Ruby 1.8.6 p287 or p369. See if it goes away under one of those.

Don’t forget to rebuild all your gem native libs if you switch Ruby
builds.

Also, try the Rails list, see what those folks might have to say.

ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.6-p287.tar.gz

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