ActiveRecord::ConnectionTimeoutError: could not obtain a connection from the pool within 5.000 seconds (waited 5.005 seconds); all pooled connections were in use

[komagata]

View details in Rollbar: https://app.rollbar.com/a/komagata/fix/item/Bootcamp/1652

ActiveRecord::ConnectionTimeoutError: could not obtain a connection from the pool within 5.000 seconds (waited 5.005 seconds); all pooled connections were in use
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 210, in block in wait_poll
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 199, in loop
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 199, in wait_poll
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 160, in internal_poll
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 286, in internal_poll
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 155, in block in poll
  File "/usr/local/lib/ruby/3.1.0/monitor.rb", line 202, in synchronize
  File "/usr/local/lib/ruby/3.1.0/monitor.rb", line 202, in mon_synchronize
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 164, in synchronize
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 155, in poll
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 870, in acquire_connection
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 588, in checkout
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 428, in connection
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_adapters/abstract/connection_pool.rb", line 1128, in retrieve_connection
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_handling.rb", line 327, in retrieve_connection
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/connection_handling.rb", line 283, in connection
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/model_schema.rb", line 380, in table_exists?
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/attribute_methods.rb", line 163, in attribute_names
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 109, in block in include
  File "/usr/local/lib/ruby/3.1.0/mutex_m.rb", line 79, in synchronize
  File "/usr/local/lib/ruby/3.1.0/mutex_m.rb", line 79, in mu_synchronize
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 103, in include
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 269, in _extract_parameters
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 265, in _wrap_parameters
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 291, in _perform_parameter_wrapping
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal/params_wrapper.rb", line 248, in process_action
  File "/usr/local/bundle/gems/activerecord-6.1.4.7/lib/active_record/railties/controller_runtime.rb", line 27, in process_action
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/abstract_controller/base.rb", line 165, in process
  File "/usr/local/bundle/gems/actionview-6.1.4.7/lib/action_view/rendering.rb", line 39, in process
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal.rb", line 190, in dispatch
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_controller/metal.rb", line 254, in dispatch
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 50, in dispatch
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 33, in serve
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 50, in block in serve
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 32, in each
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/journey/router.rb", line 32, in serve
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/routing/route_set.rb", line 842, in call
  File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 202, in call!
  File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 169, in call
  File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 202, in call!
  File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/strategy.rb", line 169, in call
  File "/usr/local/bundle/gems/omniauth-2.1.1/lib/omniauth/builder.rb", line 44, in call
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/tempfile_reaper.rb", line 15, in call
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/etag.rb", line 27, in call
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/conditional_get.rb", line 27, in call
  File "/usr/local/bundle/gems/rack-user_agent-0.5.3/lib/rack/user_agent.rb", line 16, in call
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/head.rb", line 12, in call
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/http/permissions_policy.rb", line 22, in call
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/http/content_security_policy.rb", line 18, in call
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/session/abstract/id.rb", line 266, in context
  File "/usr/local/bundle/gems/rack-2.2.8.1/lib/rack/session/abstract/id.rb", line 260, in call
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/cookies.rb", line 689, in call
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/callbacks.rb", line 27, in block in call
  File "/usr/local/bundle/gems/activesupport-6.1.4.7/lib/active_support/callbacks.rb", line 98, in run_callbacks
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/callbacks.rb", line 26, in call
  File "/usr/local/bundle/gems/actionpack-6.1.4.7/lib/action_dispatch/middleware/actionable_exceptions.rb", line 18, in call
  File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar/middleware/rails/rollbar.rb", line 25, in block in call
  File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar.rb", line 145, in scoped
  File "/usr/local/bundle/gems/rollbar-3.5.2/lib/rollbar/middleware/rails