ActiveRecord::StatementInvalid error

When I try to run my webserver in the production environment I just get an application error message. This is all I can find in the log: ActiveRecord::StatementInvalid /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:274:in `table_structure' /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/ core_ext/object/misc.rb:23:in `returning' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:273:in `table_structure' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:210:in `columns' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:760:in `columns' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:768:in `columns_hash' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:105:in `setup_sessid_compatibility! ' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:79:in `find_by_session_id' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:283:in `initialize' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:864:in `silence' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:283:in `initialize' /usr/lib/ruby/1.8/cgi/session.rb:273:in `initialize' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:122:in `session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:154:in `stale_session_check!' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:109:in `session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:1052:in `assign_shortcuts_without_flash' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ flash.rb:140:in `assign_shortcuts' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:424:in `process_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ filters.rb:624:in `process_without_session_management_support' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session_management.rb:114:in `process' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:330:in `process' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/dispatcher.rb:41:in `dispatch' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:168:in `process_request' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:143:in `process_each_request!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:109:in `with_signal_handler' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:142:in `process_each_request!' /usr/lib/ruby/1.8/fcgi.rb:600:in `each_cgi' /usr/lib/ruby/1.8/fcgi.rb:597:in `each_cgi' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:141:in `process_each_request!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:55:in `process!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:25:in `process!' /usr/local/code/ruby/coverage-prod/public/dispatch.fcgi:24 ActiveRecord::StatementInvalid /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:274:in `table_structure' /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.0/lib/active_support/ core_ext/object/misc.rb:23:in `returning' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:273:in `table_structure' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ connection_adapters/sqlite_adapter.rb:210:in `columns' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:760:in `columns' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:768:in `columns_hash' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:105:in `setup_sessid_compatibility! ' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:79:in `find_by_session_id' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:283:in `initialize' /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.1/lib/active_record/ base.rb:864:in `silence' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session/active_record_store.rb:283:in `initialize' /usr/lib/ruby/1.8/cgi/session.rb:273:in `initialize' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:122:in `session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:154:in `stale_session_check!' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ cgi_process.rb:109:in `session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:1052:in `assign_shortcuts_without_flash' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ flash.rb:140:in `assign_shortcuts' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:424:in `process_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ filters.rb:624:in `process_without_session_management_support' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ session_management.rb:114:in `process' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.1/lib/action_controller/ base.rb:330:in `process' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/dispatcher.rb:41:in `dispatch' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:168:in `process_request' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:143:in `process_each_request!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:109:in `with_signal_handler' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:142:in `process_each_request!' /usr/lib/ruby/1.8/fcgi.rb:600:in `each_cgi' /usr/lib/ruby/1.8/fcgi.rb:597:in `each_cgi' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:141:in `process_each_request!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:55:in `process!' /usr/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/fcgi_handler.rb:25:in `process!' /usr/local/code/ruby/coverage-prod/public/dispatch.fcgi:24

How can I debug this? Is there some way to figure out what the invalid statement is?

go into config/environment.rb and uncomment the line

  # config.log_level = :debug

then restart

don't forget to comment it and restart again after you've fixed the problem.