Stacktrace of the exception

gistfile1.rb

[ pid=18421 thr=70134877964720 file=utils.rb:176 time=2011-06-08 01:21:06.693 ]: *** Exception PGError in application (server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request.
) (process 18421, thread #<Thread:0x7f9318f99360>):
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/postgresql_adapter.rb:273:in `query'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/postgresql_adapter.rb:273:in `clear_cache!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/postgresql_adapter.rb:272:in `each_value'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/postgresql_adapter.rb:272:in `clear_cache!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/postgresql_adapter.rb:300:in `disconnect!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:191:in `disconnect_without_synchronization!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:190:in `each'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:190:in `disconnect_without_synchronization!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activesupport-3.1.0.rc1/lib/active_support/core_ext/module/synchronization.rb:35:in `disconnect!'
        from /usr/local/rvm/rubies/ruby-1.8.7-p334/lib/ruby/1.8/monitor.rb:242:in `synchronize'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activesupport-3.1.0.rc1/lib/active_support/core_ext/module/synchronization.rb:34:in `disconnect!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `clear_all_connections!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `each_value'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_pool.rb:374:in `clear_all_connections!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `__send__'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/activerecord-3.1.0.rc1/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `clear_all_connections!'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/utils.rb:398:in `before_handling_requests'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/rack/application_spawner.rb:204:in `start_request_handler'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/rack/application_spawner.rb:170:in `send'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/rack/application_spawner.rb:170:in `handle_spawn_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/utils.rb:479:in `safe_fork'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/rack/application_spawner.rb:165:in `handle_spawn_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:180:in `start'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/rack/application_spawner.rb:128:in `start'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/spawn_manager.rb:253:in `spawn_rack_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/spawn_manager.rb:246:in `spawn_rack_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/spawn_manager.rb:244:in `spawn_rack_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/spawn_manager.rb:137:in `spawn_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
        from /usr/local/rvm/gems/ruby-1.8.7-p334/gems/passenger-3.0.7/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
        from /usr/local/rvm/gems/ruby-1.8.7-p334//gems/passenger-3.0.7//helper-scripts/passenger-spawn-server:99