Enhance error reporting on startup #415
Description
https://github.com/killbill/killbill-admin-ui/blob/master/app/helpers/kaui/exception_helper.rb#L5 doesn't always propagate the exception to the user.
For instance, specifying KAUI_CONFIG_DAO_URL=jdbc:mariadb://db:3306/kaui, it throws:
RuntimeError (#<ActiveRecord::StatementInvalid: ActiveRecord::JDBCError: Didn't get a connection. Wrong URL?>):
kaui (3.0.4) app/controllers/kaui/sessions_controller.rb:15:in `block in SessionsController'
org/jruby/RubyBasicObject.java:2620:in `instance_exec'
activesupport (7.0.8.5) lib/active_support/rescuable.rb:116:in `block in handler_for_rescue'
activesupport (7.0.8.5) lib/active_support/rescuable.rb:92:in `rescue_with_handler'
activesupport (7.0.8.5) lib/active_support/rescuable.rb:165:in `rescue_with_handler'
actionpack (7.0.8.5) lib/action_controller/metal/rescue.rb:26:in `process_action'
actionpack (7.0.8.5) lib/action_controller/metal/instrumentation.rb:67:in `block in process_action'
activesupport (7.0.8.5) lib/active_support/notifications.rb:206:in `block in instrument'
activesupport (7.0.8.5) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (7.0.8.5) lib/active_support/notifications.rb:206:in `instrument'
actionpack (7.0.8.5) lib/action_controller/metal/instrumentation.rb:66:in `process_action'
actionpack (7.0.8.5) lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord (7.0.8.5) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (7.0.8.5) lib/abstract_controller/base.rb:151:in `process'
actionview (7.0.8.5) lib/action_view/rendering.rb:39:in `process'
but the UI doesn't show anything useful.
- Fix handling of that specific error above
- Regardless of the error, always log the full error in the logs for ease of debugging