GitLab Error 502 After run system update 'yum update'

Yester day i have update system with cmd ‘yum update’ and then after reboot system
Gitlab can’t access with
Erro 502 Whoops, GitLab is taking too much time to respond.

I 've find out solution form google with gitlab-ctl reconfig but it’s not working.

Log on /var/log/gitlab/unicorn/unicorn_stderr.log was show below.
Pls help me. what 's wrong ?
**** Update**** Now It’s work with command >> ‘gitlab-ctl reconfigure’

==> /var/log/gitlab/unicorn/unicorn_stderr.log <==
TypeError: no implicit conversion of nil into String
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:83:in expand_path' /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:83:in absolute’
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:405:in block in <top (required)>' /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:403:in each’
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:403:in <top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:268:in load’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:268:in block in load' /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:268:in load' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:652:in block in load_config_initializer’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/notifications.rb:166:in instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:651:in load_config_initializer’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:616:in block (2 levels) in <class:Engine>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:615:in each’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:615:in block in <class:Engine>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:30:in instance_exec’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:30:in run' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:55:in block in run_initializers’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:228:in block in tsort_each' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:422:in block (2 levels) in each_strongly_connected_component_from' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:431:in each_strongly_connected_component_from’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:421:in block in each_strongly_connected_component_from' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:44:in each’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:44:in tsort_each_child' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:415:in call’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:415:in each_strongly_connected_component_from' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:349:in block in each_strongly_connected_component’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in each' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in call’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in each_strongly_connected_component' /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:226:in tsort_each’
/opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:205:in tsort_each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:54:in run_initializers’
/opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/application.rb:352:in initialize!' /opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:5: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 ’
/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
/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)>’

==> /var/log/gitlab/unicorn/current <==
2017-04-25_02:40:08.60045 master failed to start, check stderr log for details
2017-04-25_02:40:09.61674 failed to start a new unicorn master
2017-04-25_02:40:09.65166 starting new unicorn master

==> /var/log/gitlab/sidekiq/current <==
2017-04-25_02:40:10.82658 no implicit conversion of nil into String
2017-04-25_02:40:10.82966 /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:83:in expand_path' 2017-04-25_02:40:10.82967 /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:83:in absolute’
2017-04-25_02:40:10.82967 /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:405:in block in <top (required)>' 2017-04-25_02:40:10.82968 /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:403:in each’
2017-04-25_02:40:10.82968 /opt/gitlab/embedded/service/gitlab-rails/config/initializers/1_settings.rb:403:in <top (required)>' 2017-04-25_02:40:10.82969 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:268:in load’
2017-04-25_02:40:10.82969 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:268:in block in load' 2017-04-25_02:40:10.82971 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:240:in load_dependency’
2017-04-25_02:40:10.82971 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:268:in load' 2017-04-25_02:40:10.82972 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:652:in block in load_config_initializer’
2017-04-25_02:40:10.82973 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/notifications.rb:166:in instrument' 2017-04-25_02:40:10.82974 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:651:in load_config_initializer’
2017-04-25_02:40:10.82974 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:616:in block (2 levels) in <class:Engine>' 2017-04-25_02:40:10.82974 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:615:in each’
2017-04-25_02:40:10.82975 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/engine.rb:615:in block in <class:Engine>' 2017-04-25_02:40:10.82975 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:30:in instance_exec’
2017-04-25_02:40:10.82976 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:30:in run' 2017-04-25_02:40:10.82976 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:55:in block in run_initializers’
2017-04-25_02:40:10.82976 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:228:in block in tsort_each' 2017-04-25_02:40:10.82977 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component’
2017-04-25_02:40:10.82978 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:422:in block (2 levels) in each_strongly_connected_component_from' 2017-04-25_02:40:10.82978 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:431:in each_strongly_connected_component_from’
2017-04-25_02:40:10.82979 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:421:in block in each_strongly_connected_component_from' 2017-04-25_02:40:10.82979 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:44:in each’
2017-04-25_02:40:10.82979 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:44:in tsort_each_child' 2017-04-25_02:40:10.82980 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:415:in call’
2017-04-25_02:40:10.82980 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:415:in each_strongly_connected_component_from' 2017-04-25_02:40:10.82981 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:349:in block in each_strongly_connected_component’
2017-04-25_02:40:10.82981 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in each' 2017-04-25_02:40:10.82981 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in call’
2017-04-25_02:40:10.82982 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:347:in each_strongly_connected_component' 2017-04-25_02:40:10.82983 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:226:in tsort_each’
2017-04-25_02:40:10.82983 /opt/gitlab/embedded/lib/ruby/2.3.0/tsort.rb:205:in tsort_each' 2017-04-25_02:40:10.82983 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/initializable.rb:54:in run_initializers’
2017-04-25_02:40:10.82987 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/railties-4.2.8/lib/rails/application.rb:352:in initialize!' 2017-04-25_02:40:10.82988 /opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:5:in <top (required)>’
2017-04-25_02:40:10.82988 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in require' 2017-04-25_02:40:10.82989 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in block in require’
2017-04-25_02:40:10.82989 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:240:in load_dependency' 2017-04-25_02:40:10.82990 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.8/lib/active_support/dependencies.rb:274:in require’
2017-04-25_02:40:10.82990 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/sidekiq-4.2.7/lib/sidekiq/cli.rb:240:in boot_system' 2017-04-25_02:40:10.82991 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/sidekiq-4.2.7/lib/sidekiq/cli.rb:50:in run’
2017-04-25_02:40:10.82992 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/sidekiq-4.2.7/bin/sidekiq:12:in <top (required)>' 2017-04-25_02:40:10.82992 /opt/gitlab/embedded/bin/sidekiq:22:in load’
2017-04-25_02:40:10.82992 /opt/gitlab/embedded/bin/sidekiq:22:in <top (required)>' 2017-04-25_02:40:10.82993 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:74:in load’
2017-04-25_02:40:10.82993 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:74:in kernel_load' 2017-04-25_02:40:10.82994 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:27:in run’
2017-04-25_02:40:10.82994 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:332:in exec' 2017-04-25_02:40:10.82994 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/command.rb:27:in run’
2017-04-25_02:40:10.82995 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in invoke_command' 2017-04-25_02:40:10.82995 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor.rb:359:in dispatch’
2017-04-25_02:40:10.82996 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:20:in dispatch' 2017-04-25_02:40:10.82997 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/base.rb:440:in start’
2017-04-25_02:40:10.82997 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:11:in start' 2017-04-25_02:40:10.82998 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/exe/bundle:34:in block in <top (required)>’
2017-04-25_02:40:10.82998 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/friendly_errors.rb:100:in with_friendly_errors' 2017-04-25_02:40:10.82998 /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/exe/bundle:26:in <top (required)>’
2017-04-25_02:40:10.82999 /opt/gitlab/embedded/bin/bundle:22:in load' 2017-04-25_02:40:10.82999 /opt/gitlab/embedded/bin/bundle:22:in

==> /var/log/gitlab/unicorn/unicorn_stderr.log <==
I, [2017-04-25T09:40:11.724953 #21887] INFO – : Refreshing Gem list
^[^[:q^C/opt/gitlab/embedded/bin/omnibus-ctl: Interrupt

[root@git unicorn]# vi unicorn_stderr.log
/opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:5: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)>’
I, [2017-04-25T09:40:11.724953 #21887] INFO – : Refreshing Gem list

Now. It 's working when run cmd ‘gitlab-ctl reconfigure’