Async w/ ActiveJob silently fails

[budnik]

I just tried to setup raven-ruby following docs:

Raven.configure do |config|
  config.async = ->(event) { SentryJob.perform_later(event.to_hash) }
end

It was silently failing to enqueue the job util I changed to:

Raven.configure do |config|
  config.async = ->(event) { SentryJob.perform_later(event.to_hash.except(:request) }
end

I tried both :inline and :sidekiq AJ backends, I think there's some serialization issue that is swallowed silently. I'm going to provide repro gists soon meanwhile I opening this issue now to share this workaround.

[nateberkopec]

:( We should make sure we fail loudly if async is misconfigured.

[jeremy]

Hit this too. May be nice to fall back to non-async capture of both the event and the async exception.

[nateberkopec]

FWIW we're getting Thread.report_on_exception in Ruby 2.4.

[nateberkopec]

I think this is related to #511.

[nateberkopec]

PR for sync fallback is available at #548