Catch ActiveRecord::ConnectionTimeoutError

[wkrsz]

I had misconfigured ActiveRecord connect pool: just enough connections for Puma but not for sucker_punch workers. Under higher load requests were failing with ActiveRecord::ConnectionTimeoutError. Unfortunately there was no notification because the exception was raised earlier in Rack middleware, before exception notifier.

I solved this by inserting exception notifier lower in middleware stack:

config.app_middleware.insert_before ActiveRecord::ConnectionAdapters::ConnectionManagement, ExceptionNotification::Rack

Maybe this should be a default in lib/exception_notification/rails.rb?

[woto]

+1 for this hint

[smartinez87]

@WojtekKruszewski sounds right, can you create a PR for it?