Sequel error

gistfile1.txt

Mysql2::Error::ConnectionError: MySQL server has gone away ["/usr/local/rvm/gems/ruby-2.3.6/gems/mysql2-0.5.0/lib/mysql2/client.rb:131:in `_query'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/mysql2-0.5.0/lib/mysql2/client.rb:131:in `block in query'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/mysql2-0.5.0/lib/mysql2/client.rb:130:in `handle_interrupt'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/mysql2-0.5.0/lib/mysql2/client.rb:130:in `query'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/mysql2.rb:137:in `block in _execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/database/logging.rb:38:in `log_connection_yield'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/mysql2.rb:132:in `_execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/utils/mysql_mysql2.rb:38:in `block in execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/database/connecting.rb:264:in `block in synchronize'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/connection_pool/threaded.rb:91:in `hold'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/database/connecting.rb:264:in `synchronize'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/utils/mysql_mysql2.rb:38:in `execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/dataset/actions.rb:1085:in `execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/mysql2.rb:273:in `execute'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/adapters/mysql2.rb:236:in `fetch_rows'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/dataset/actions.rb:149:in `each'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/dataset/actions.rb:51:in `block in all'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/dataset/actions.rb:1002:in `_all'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/dataset/actions.rb:51:in `all'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sequel-5.6.0/lib/sequel/model/plugins.rb:33:in `all'",
"/home/app/application/controllers/admin/domains_controller.rb:42:in `block in <class:DomainsController>'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1634:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1634:in `block in compile!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:992:in `block (3 levels) in route!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1011:in `route_eval'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:992:in `block (2 levels) in route!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1039:in `block in process_route'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1037:in `catch'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1037:in `process_route'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:990:in `block in route!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:989:in `each'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:989:in `route!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1096:in `block in dispatch!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `block in invoke'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `catch'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `invoke'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1093:in `dispatch!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:924:in `block in call!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `block in invoke'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `catch'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1075:in `invoke'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:924:in `call!'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:913:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/session/abstract/id.rb:232:in `context'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/session/abstract/id.rb:226:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/xss_header.rb:18:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/path_traversal.rb:16:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/json_csrf.rb:26:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/base.rb:50:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/base.rb:50:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/rack-protection-2.0.1/lib/rack/protection/frame_options.rb:31:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/null_logger.rb:9:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/head.rb:12:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:194:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1957:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1501:in `block in call'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1728:in `synchronize'",
"/usr/local/rvm/gems/ruby-2.3.6/gems/sinatra-2.0.1/lib/sinatra/base.rb:1501:in `call'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/urlmap.rb:68:in `block in call'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/urlmap.rb:53:in `each'",
"/usr/local/rvm/gems/ruby-2.3.6@global/gems/rack-2.0.4/lib/rack/urlmap.rb:53:in `call'",
"/usr/lib/ruby/vendor_ruby/phusion_passenger/rack/thread_handler_extension.rb:97:in `process_request'",
"/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:152:in `accept_and_process_next_request'",
"/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler/thread_handler.rb:113:in `main_loop'",
"/usr/lib/ruby/vendor_ruby/phusion_passenger/request_handler.rb:416:in `block (3 levels) in start_threads'",
"/usr/lib/ruby/vendor_ruby/phusion_passenger/utils.rb:113:in `block in create_thread_and_abort_on_exception'"]