This app attempts to minimally reproduce a file reloading error with the Cangaroo source code.

The error prevents PollJob classes from updating poll timestamps and (more importantly) from processing response payloads. In the logs, the error looks like this:

Job ActiveJob::QueueAdapters::DelayedJobAdapter::JobWrapper (id=5) (queue=cangaroo)
FAILED (1 prior attempts) with ArgumentError: A copy of Cangaroo::BaseJob has
been removed from the module tree but is still active!

bundle
bundle exec rake db:create db:migrate db:seed

Open 2 separate shells:

# in the first shell
bundle exec rails s -p 3100 # start the rails server

# in the second shell
bundle exec rake cangaroo:poll # add a poll job to the queue
bin/delayed_job start # start a worker process
tail -f log/delayed_job.log # watch what the worker does

Once the MyPollShipmentJob runs, you will see the following error in the worker log file:

Job ActiveJob::QueueAdapters::DelayedJobAdapter::JobWrapper (id=5) (queue=cangaroo)
FAILED (1 prior attempts) with ArgumentError: A copy of Cangaroo::BaseJob has
been removed from the module tree but is still active!

As a result of this error, the poll timestamp for this connection is not updated, nor is PerformFlows triggered. Polling, in other words, is broken.