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rails--rails/activejob/CHANGELOG.md
Daniel Morton 94ccd5410d
retry_on parameter attempts now accepts :unlimited (#41761) 
In some applications, some classes of errors may be raised during the
execution of a job which the developer would want to retry forever.

These classes of errors would most likely be infrastructure problems that
the developer knows will be resolved eventually but may take a variable
amount of time or errors where due to application business logic, there
could be something temporarily blocking the job from executing, like a
resource that is needed for the job being locked for a lengthy amount of
time.

While an arbitrarily large number of attempts could previously be passed,
this is inexpressive as sometimes the developer may just need the job to
continue to be retried until it eventually succeeds. Without this,
developers would need to include additional code to handle the situation
where the job eventually fails its attempts limit and has to be re-enqueued
manually.

As with many things this should be used with caution and only for errors
that the developer knows will definitely eventually be resolved, allowing
the job to continue.

[Daniel Morton + Rafael Mendonça França]
2021-07-28 18:32:19 -04:00

1.9 KiB
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  • Allow a job to retry indefinitely

    The attempts parameter of the retry_on method now accepts the symbol reference :unlimited in addition to a specific number of retry attempts to allow a developer to specify that a job should retry forever until it succeeds.

    class MyJob < ActiveJob::Base
  retry_on(AlwaysRetryException, attempts: :unlimited)

  # the actual job code
end

    Daniel Morton

  • Added possibility to check on :priority in test helper methods assert_enqueued_with and assert_performed_with.

    Wojciech Wnętrzak

  • OpenSSL constants are now used for Digest computations.

    Dirkjan Bussink

  • Add a Serializer for the Range class.

    This should allow things like MyJob.perform_later(range: 1..100).

  • Communicate enqueue failures to callers of perform_later.

    perform_later can now optionally take a block which will execute after the adapter attempts to enqueue the job. The block will receive the job instance as an argument even if the enqueue was not successful. Additionally, ActiveJob adapters now have the ability to raise an ActiveJob::EnqueueError which will be caught and stored in the job instance so code attempting to enqueue jobs can inspect any raised EnqueueError using the block.

    MyJob.perform_later do |job|
  unless job.successfully_enqueued?
    if job.enqueue_error&.message == "Redis was unavailable"
      # invoke some code that will retry the job after a delay
    end
  end
end

    Daniel Morton

  • Don't log rescuable exceptions defined with rescue_from.

    Hu Hailin

  • Allow rescue_from to rescue all exceptions.

    Adrianna Chang, Étienne Barrié

Please check 6-1-stable for previous changes.