# A frustrating and strange error when config.action\_controller.perform\_caching = true **URL:** \ **Category:** Rails\ **Created:** [April 17, 2009, 2:46pm UTC](https://www.ruby-forum.com/t/a-frustrating-and-strange-error-when-config-action-controller-perform-caching-true/165793 "2009-04-17T14:46:29Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Tim\_U](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/90db22/32.png) [@Tim\_U](https://www.ruby-forum.com/u/Tim_U)\ **Post date:** [April 17, 2009, 2:46pm UTC](https://www.ruby-forum.com/t/a-frustrating-and-strange-error-when-config-action-controller-perform-caching-true/165793/1 "2009-04-17T14:46:29Z")
Hello all. I am having a hell of a problem and it’s driving me nuts. I get the following error (undefined method `controller\_name’ for nil:NilClass): but only when config.action\_controller.perform\_caching = true I googled around some and found this thread [http://groups.google.com/group/communityengine/browse\_thread/thread/b84154e5228bf9f3which](http://groups.google.com/group/communityengine/browse_thread/thread/b84154e5228bf9f3which) suggests it may be a conflict with a pllug in controller but I don’t see any two controllers with the same name. This particular controller is using activescaffold and I think that might be a part of the problem though I can’t be sure. As you can see from the stacktrace rails has finished rendering the page and seems to throw a fit during sweeping.rb. Also none of my controllers are mentioned in the stacktrace. What can I do to figure out why this is failing? This is driving me nuts. End of component rendering 2009-04-17T13:22:22+01:00 : DEBUG : Rendered match/\_provider\_summary (37.0ms) 2009-04-17T13:22:22+01:00 : FATAL : NoMethodError (undefined method `controller_name' for nil:NilClass): /vendor/rails/actionpack/lib/action_controller/caching/sweeping.rb:83:in `callback’ /vendor/rails/actionpack/lib/action\_controller/caching/sweeping.rb:65:in `after' /vendor/rails/actionpack/lib/action_controller/filters.rb:208:in `around\_proc’ /vendor/rails/activesupport/lib/active\_support/callbacks.rb:182:in `call' /vendor/rails/activesupport/lib/active_support/callbacks.rb:182:in `evaluate\_method’ /vendor/rails/actionpack/lib/action\_controller/filters.rb:184:in `call' /vendor/rails/actionpack/lib/action_controller/filters.rb:635:in `run\_before\_filters’ /vendor/rails/actionpack/lib/action\_controller/filters.rb:615:in `call_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:610:in `perform\_action\_without\_benchmark’ /vendor/rails/actionpack/lib/action\_controller/benchmarking.rb:68:in `perform_action_without_rescue' /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure’ /vendor/rails/actionpack/lib/action\_controller/benchmarking.rb:68:in `perform_action_without_rescue' /vendor/rails/actionpack/lib/action_controller/rescue.rb:136:in `perform\_action\_without\_caching’ /vendor/rails/actionpack/lib/action\_controller/caching/sql\_cache.rb:13:in `passenger\_orig\_perform\_action’ /vendor/rails/activerecord/lib/active\_record/connection\_adapters/abstract/query\_cache.rb:34:in `cache' /vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in `cache’ /vendor/rails/actionpack/lib/action\_controller/caching/sql\_cache.rb:12:in `passenger\_orig\_perform\_action’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/request\_handler.rb:53:in `perform_action' /vendor/rails/actionpack/lib/action_controller/base.rb:524:in `send’ /vendor/rails/actionpack/lib/action\_controller/base.rb:524:in `process_without_filters' /vendor/rails/actionpack/lib/action_controller/filters.rb:606:in `process\_without\_session\_management\_support’ /vendor/rails/actionpack/lib/action\_controller/session\_management.rb:134:in `process' /vendor/rails/actionpack/lib/action_controller/base.rb:392:in `process’ /vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:183:in `handle_request' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:110:in `dispatch\_unlocked’ /vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:123:in `dispatch' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:122:in `synchronize’ /vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:122:in `dispatch' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:132:in `dispatch\_cgi’ /vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:39:in `dispatch’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/request\_handler.rb:38:in `process\_request’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_request\_handler.rb:197:in `main\_loop’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/application\_spawner.rb:340:in `start\_request\_handler’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/application\_spawner.rb:298:in `handle\_spawn\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/utils.rb:176:in `safe\_fork’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/application\_spawner.rb:296:in `handle\_spawn\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:332:in ` **send** ’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:332:in `main\_loop’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:182:in `start\_synchronously’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:149:in `start’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/railz/application\_spawner.rb:192:in `start’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/spawn\_manager.rb:260:in `spawn\_rails\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server\_collection.rb:121:in `lookup\_or\_add’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/spawn\_manager.rb:254:in `spawn\_rails\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server\_collection.rb:75:in `synchronize’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server\_collection.rb:74:in `synchronize’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/spawn\_manager.rb:253:in `spawn\_rails\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/spawn\_manager.rb:148:in `spawn\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/spawn\_manager.rb:285:in `handle\_spawn\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:332:in ` **send** ’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:332:in `main\_loop’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/lib/phusion\_passenger/abstract\_server.rb:182:in `start\_synchronously’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.1.3/bin/passenger-spawn-server:50