Mysql2::Error: Lost connection to MySQL server at 'reading initial communication packet', system error: 110

[ualbertalib-bot]

View details in Rollbar: https://rollbar.com/ualbertalib/ERA/items/125/

Mysql2::Error: Lost connection to MySQL server at 'reading initial communication packet', system error: 110
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/mysql2-0.3.20/lib/mysql2/client.rb", line 70, in connect
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/mysql2-0.3.20/lib/mysql2/client.rb", line 70, in initialize
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/mysql2_adapter.rb", line 18, in new
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/mysql2_adapter.rb", line 18, in mysql2_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 438, in new_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 448, in checkout_new_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 422, in acquire_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 349, in block in checkout
  File "/usr/lib64/ruby/2.3.0/monitor.rb", line 214, in mon_synchronize
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 348, in checkout
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 263, in block in connection
  File "/usr/lib64/ruby/2.3.0/monitor.rb", line 214, in mon_synchronize
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 262, in connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 571, in retrieve_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_handling.rb", line 113, in retrieve_connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_handling.rb", line 87, in connection
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/query_cache.rb", line 31, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 653, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/active-fedora-9.4.2/lib/active_fedora/ldp_cache.rb", line 26, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/callbacks.rb", line 29, in block in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb", line 88, in __run_callbacks__
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb", line 778, in _run_call_callbacks
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb", line 81, in run_callbacks
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/callbacks.rb", line 27, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/remote_ip.rb", line 78, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/rollbar.rb", line 24, in block in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar.rb", line 145, in scoped
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/rollbar.rb", line 22, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/debug_exceptions.rb", line 17, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rollbar-2.14.1/lib/rollbar/middleware/rails/show_exceptions.rb", line 22, in call_with_rollbar
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/show_exceptions.rb", line 30, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/rack/logger.rb", line 38, in call_app
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/rack/logger.rb", line 20, in block in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/tagged_logging.rb", line 68, in block in tagged
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/tagged_logging.rb", line 26, in tagged
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/tagged_logging.rb", line 68, in tagged
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/rack/logger.rb", line 20, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/request_id.rb", line 21, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rack-1.6.4/lib/rack/methodoverride.rb", line 22, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rack-1.6.4/lib/rack/runtime.rb", line 18, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/cache/strategy/local_cache_middleware.rb", line 28, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/rack-1.6.4/lib/rack/sendfile.rb", line 113, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/engine.rb", line 518, in call
  File "/var/www/sites/hydranorth/vendor/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/application.rb", line 165, in call
  File "/usr/lib64/ruby/gems/2.3.0/gems/passenger-5.0.29/src/ruby_supportlib/phusion_passenger/rack/thread_handler_extension.rb", line 97, in process_request
  File "/usr/lib64/ruby/gems/2.3.0/gems/passenger-5.0.29/src/ruby_supportlib/phusion_passenger/request_handler/thread_handler.rb", line 152, in accept_and_process_next_request
  File "/usr/lib64/ruby/gems/2.3.0/gems/passenger-5.0.29/src/ruby_supportlib/phusion_passenger/request_handler/thread_handler.rb", line 113, in main_loop
  File "/usr/lib64/ruby/gems/2.3.0/gems/passenger-5.0.29/src/ruby_supportlib/phusion_passenger/request_handler.rb", line 416, in bl