Redmine

Redmine is running in our ubuntu server using the Mongrel Service , but it always crash.

My enviroment:
Redmine version 2.1.4.stable
Ruby version 1.8.7 (x86_64-linux)
RubyGems version 1.8.24
Rack version 1.4
Rails version 3.2.8
Active Record version 3.2.8
Action Pack version 3.2.8
Active Resource version 3.2.8
Action Mailer version 3.2.8
Active Support version 3.2.8
Middleware Rack::Cache, ActionDispatch::Static, Rack::Lock, #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x7f0d0b7fc7a8>, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::Head, Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport, OpenIdAuthentication
Application root /home/redmine/redmine
Environment production
Database adapter mysql
Database schema version 20120731164049

----------DUMPS-------------

Started GET "/projects/rk3066/settings/versions" for 172.16.10.11 at Mon Dec 03 10:35:39 +0800 2012
Processing by ProjectsController#settings as HTML
Parameters: {"id"=>"rk3066", "tab"=>"versions"}
Current user: zwp (id=13)
Rendered projects/_form.html.erb (36.5ms)
Rendered projects/_edit.html.erb (38.4ms)
Rendered projects/settings/_modules.html.erb (5.0ms)
Rendered projects/settings/_members.html.erb (864.5ms)
Rendered projects/settings/_versions.html.erb (28.9ms)
Rendered projects/settings/_issue_categories.html.erb (1.5ms)
Rendered projects/settings/_wiki.html.erb (1.8ms)
Rendered projects/settings/_repositories.html.erb (1.5ms)
Rendered projects/settings/_boards.html.erb (1.5ms)
Rendered projects/settings/_activities.html.erb (8.3ms)
Rendered common/_tabs.html.erb (959.6ms)
Rendered projects/settings.html.erb within layouts/base (960.6ms)
Completed 200 OK in 1020ms (Views: 989.6ms | ActiveRecord: 18.2ms)
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.8/lib/active_support/cache.rb:587: [BUG] Segmentation fault
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

-------OR---------

Started GET "/issues/1725" for 172.16.19.131 at Mon Dec 03 14:23:33 +0800 2012
Processing by IssuesController#show as HTML
Parameters: {"id"=>"1725"}
Current user: catamout (id=24)
Rendered issues/_action_menu.html.erb (157.4ms)
Rendered issue_relations/_form.html.erb (1.7ms)
Rendered issues/_relations.html.erb (3.3ms)
Rendered issues/_history.html.erb (4.7ms)
Rendered issues/_action_menu.html.erb (3.8ms)
Rendered issues/_form_custom_fields.html.erb (6.5ms)
Rendered issues/_attributes.html.erb (311.3ms)
Rendered issues/_form.html.erb (322.7ms)
Rendered attachments/_form.html.erb (1.9ms)
Rendered issues/_edit.html.erb (333.8ms)
Rendered issues/_sidebar.html.erb (6.8ms)
Rendered issues/show.html.erb within layouts/base (538.5ms)
Completed 200 OK in 641ms (Views: 552.6ms | ActiveRecord: 23.0ms)
/usr/lib/ruby/gems/1.8/gems/rack-cache-1.2/lib/rack/cache/context.rb:61: [BUG] Segmentation fault
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]