I have the same issue here, on a Jessie system upgraded from Wheezy-backports (redmine 2.5).
root@redmine:/usr/share/redmine# RAILS_ENV=production rake db:migrate rake aborted! NameError: uninitialized constant RedmineApp::Application::YAML (See full trace by running task with --trace) root@redmine:/usr/share/redmine# RAILS_ENV=production rake db:migrate --trace rake aborted! NameError: uninitialized constant RedmineApp::Application::YAML /usr/share/redmine/config/application.rb:77:in `<class:Application>' /usr/share/redmine/config/application.rb:25:in `<module:RedmineApp>' /usr/share/redmine/config/application.rb:24:in `<top (required)>' /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require' /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require' /usr/share/redmine/Rakefile:5:in `<top (required)>' /usr/lib/ruby/vendor_ruby/rake/rake_module.rb:28:in `load' /usr/lib/ruby/vendor_ruby/rake/rake_module.rb:28:in `load_rakefile' /usr/lib/ruby/vendor_ruby/rake/application.rb:687:in `raw_load_rakefile' /usr/lib/ruby/vendor_ruby/rake/application.rb:94:in `block in load_rakefile' /usr/lib/ruby/vendor_ruby/rake/application.rb:176:in `standard_exception_handling' /usr/lib/ruby/vendor_ruby/rake/application.rb:93:in `load_rakefile' /usr/lib/ruby/vendor_ruby/rake/application.rb:77:in `block in run' /usr/lib/ruby/vendor_ruby/rake/application.rb:176:in `standard_exception_handling' /usr/lib/ruby/vendor_ruby/rake/application.rb:75:in `run' /usr/bin/rake:27:in `<main>' The specific line with the "constant" is: sessionconfig = YAML::load_file(filename) Adding: require "yaml" somewhere on the top of that file got me a slightly different error message: root@redmine:/usr/share/redmine# RAILS_ENV=production rake db:migrate config.eager_load is set to nil. Please update your config/environments/*.rb files accordingly: * development - set it to false * test - set it to false (unless you use a tool that preloads your * test environment) * production - set it to true rake aborted! NameError: uninitialized constant ActiveModel::MassAssignmentSecurity Tasks: TOP => db:migrate => environment I have a feeling I'm still doing something wrong. Full trace: root@redmine:/usr/share/redmine# RAILS_ENV=production rake db:migrate --trace ** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment config.eager_load is set to nil. Please update your config/environments/*.rb files accordingly: * development - set it to false * test - set it to false (unless you use a tool that preloads your * test environment) * production - set it to true rake aborted! NameError: uninitialized constant ActiveModel::MassAssignmentSecurity /usr/lib/ruby/vendor_ruby/active_record/attribute_assignment.rb:6:in `<module:AttributeAssignment>' /usr/lib/ruby/vendor_ruby/active_record/attribute_assignment.rb:4:in `<module:ActiveRecord>' /usr/lib/ruby/vendor_ruby/active_record/attribute_assignment.rb:3:in `<top (required)>' /usr/lib/ruby/vendor_ruby/active_record/base.rb:701:in `<class:Base>' /usr/lib/ruby/vendor_ruby/active_record/base.rb:333:in `<module:ActiveRecord>' /usr/lib/ruby/vendor_ruby/active_record/base.rb:33:in `<top (required)>' /usr/share/redmine/lib/plugins/acts_as_activity_provider/init.rb:2:in `block in <top (required)>' /usr/share/redmine/config/initializers/00-core_plugins.rb:12:in `eval' /usr/share/redmine/config/initializers/00-core_plugins.rb:12:in `block in <top (required)>' /usr/share/redmine/config/initializers/00-core_plugins.rb:2:in `each' /usr/share/redmine/config/initializers/00-core_plugins.rb:2:in `<top (required)>' /usr/lib/ruby/vendor_ruby/rails/engine.rb:648:in `block in load_config_initializer' /usr/lib/ruby/vendor_ruby/active_support/notifications.rb:161:in `instrument' /usr/lib/ruby/vendor_ruby/rails/engine.rb:647:in `load_config_initializer' /usr/lib/ruby/vendor_ruby/rails/engine.rb:612:in `block (2 levels) in <class:Engine>' /usr/lib/ruby/vendor_ruby/rails/engine.rb:611:in `each' /usr/lib/ruby/vendor_ruby/rails/engine.rb:611:in `block in <class:Engine>' /usr/lib/ruby/vendor_ruby/rails/initializable.rb:30:in `instance_exec' /usr/lib/ruby/vendor_ruby/rails/initializable.rb:30:in `run' /usr/lib/ruby/vendor_ruby/rails/initializable.rb:55:in `block in run_initializers' /usr/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each' /usr/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component' /usr/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from' /usr/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component' /usr/lib/ruby/2.1.0/tsort.rb:345:in `each' /usr/lib/ruby/2.1.0/tsort.rb:345:in `call' /usr/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component' /usr/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each' /usr/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each' /usr/lib/ruby/vendor_ruby/rails/initializable.rb:54:in `run_initializers' /usr/lib/ruby/vendor_ruby/rails/application.rb:300:in `initialize!' /usr/lib/ruby/vendor_ruby/rails/railtie.rb:194:in `public_send' /usr/lib/ruby/vendor_ruby/rails/railtie.rb:194:in `method_missing' /usr/share/redmine/config/environment.rb:14:in `<top (required)>' /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require' /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require' /usr/lib/ruby/vendor_ruby/rails/application.rb:276:in `require_environment!' /usr/lib/ruby/vendor_ruby/rails/application.rb:389:in `block in run_tasks_blocks' /usr/lib/ruby/vendor_ruby/rake/task.rb:240:in `call' /usr/lib/ruby/vendor_ruby/rake/task.rb:240:in `block in execute' /usr/lib/ruby/vendor_ruby/rake/task.rb:235:in `each' /usr/lib/ruby/vendor_ruby/rake/task.rb:235:in `execute' /usr/lib/ruby/vendor_ruby/rake/task.rb:179:in `block in invoke_with_call_chain' /usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' /usr/lib/ruby/vendor_ruby/rake/task.rb:172:in `invoke_with_call_chain' /usr/lib/ruby/vendor_ruby/rake/task.rb:201:in `block in invoke_prerequisites' /usr/lib/ruby/vendor_ruby/rake/task.rb:199:in `each' /usr/lib/ruby/vendor_ruby/rake/task.rb:199:in `invoke_prerequisites' /usr/lib/ruby/vendor_ruby/rake/task.rb:178:in `block in invoke_with_call_chain' /usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize' /usr/lib/ruby/vendor_ruby/rake/task.rb:172:in `invoke_with_call_chain' /usr/lib/ruby/vendor_ruby/rake/task.rb:165:in `invoke' /usr/lib/ruby/vendor_ruby/rake/application.rb:150:in `invoke_task' /usr/lib/ruby/vendor_ruby/rake/application.rb:106:in `block (2 levels) in top_level' /usr/lib/ruby/vendor_ruby/rake/application.rb:106:in `each' /usr/lib/ruby/vendor_ruby/rake/application.rb:106:in `block in top_level' /usr/lib/ruby/vendor_ruby/rake/application.rb:115:in `run_with_threads' /usr/lib/ruby/vendor_ruby/rake/application.rb:100:in `top_level' /usr/lib/ruby/vendor_ruby/rake/application.rb:78:in `block in run' /usr/lib/ruby/vendor_ruby/rake/application.rb:176:in `standard_exception_handling' /usr/lib/ruby/vendor_ruby/rake/application.rb:75:in `run' /usr/bin/rake:27:in `<main>' Tasks: TOP => db:migrate => environment -- Tzafrir Cohen | tzaf...@jabber.org | VIM is http://tzafrir.org.il | | a Mutt's tzaf...@cohens.org.il | | best tzaf...@debian.org | | friend -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". 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