v2.17.8

Enhancements

• [Backoff] Backoff retry on DBConnection and Postgrex errors from GenServer calls.

  GenServer calls that result in a ConnectionError or Postgrex.Error should also be caught and retried rather than crashing on the first attempt.

Bug Fixes

• [Notifier] Check for a live notifier process and propagate notify errors.

  The Notifier.notify/1 spec showed it would always return :ok, but that wasn't the case when the notifier was disconnected or the process was no longer running. Now an error tuple is returned when a notifier process isn't running.

  This situation happened most frequently during shutdown, particularly from external usage of the Notifier like an application or the oban_met package.

  In addition, the errors bubble up through top level Oban functions like scale_queue/1, pause_queue/1, etc. to indicate that the operation can't actually succeed.

• [Peers.Postgres] Rescue DBConnection.ConnectionError in peer leadership check.

  Previously, only Postgrex.Error exceptions were rescued and other standard connection errors were ignored, crashing the Peer. Because leadership is checked immediately after the peer initializes, any connection issues would trigger a crash loop that could bring down the rest of the supervision tree.