dev.gitlab.org returns 502 after upgrading, when unicorn logs show following: ``` , [2017-03-15T08:02:15.731750 #62207] INFO -- : Refreshing Gem list LoadError: cannot load such file -- google/protobuf /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `block in require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:240:in `load_dependency' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/gitaly-0.2.1/ruby/lib/gitaly/gitaly_pb.rb:4:in `<top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `block in require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:240:in `load_dependency' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/gitaly-0.2.1/ruby/lib/gitaly/gitaly_services_pb.rb:5:in `<top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `block in require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:240:in `load_dependency' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/gitaly-0.2.1/ruby/lib/gitaly.rb:4:in `<top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:91:in `block (2 levels) in require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:86:in `block in require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/runtime.rb:75:in `require' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler.rb:106:in `require' /opt/gitlab/embedded/service/gitlab-rails/config/application.rb:5:in `<top (required)>' /opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:2:in `require' /opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:2:in `<top (required)>' /opt/gitlab/embedded/service/gitlab-rails/config.ru:19:in `require' /opt/gitlab/embedded/service/gitlab-rails/config.ru:19:in `block in <main>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rack-1.6.5/lib/rack/builder.rb:55:in `instance_eval' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rack-1.6.5/lib/rack/builder.rb:55:in `initialize' /opt/gitlab/embedded/service/gitlab-rails/config.ru:1:in `new' /opt/gitlab/embedded/service/gitlab-rails/config.ru:1:in `<main>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/unicorn-5.1.0/lib/unicorn.rb:56:in `eval' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/unicorn-5.1.0/lib/unicorn.rb:56:in `block in builder' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:752:in `build_app!' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:129:in `start' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/unicorn-5.1.0/bin/unicorn:126:in `<top (required)>' /opt/gitlab/embedded/bin/unicorn:22:in `load' /opt/gitlab/embedded/bin/unicorn:22:in `<top (required)>' ``` /cc @marin @pcarranza @omame @smcgivern