Naively transition jobs stuck executing back to available.

The Lazarus plugin periodically rescues orphaned jobs, i.e. jobs that are stuck in the executing state because the node was shut down before the job could finish. Rescuing is purely based on time, rather than any heuristic about the job's expected execution time or whether the node is still alive.

If an executing job has exhausted all attempts and max_attempts > 1, the Lazarus plugin will mark it discarded rather than available.

Using the Plugin

Rescue orphaned jobs that are still executing after the default of 60 minutes:

config :my_app, Oban,
  plugins: [Pleroma.Oban.Plugins.Lazarus],
  ...

Override the default period to rescue orphans after a more aggressive period of 5 minutes:

config :my_app, Oban,
  plugins: [{Pleroma.Oban.Plugins.Lazarus, rescue_after: :timer.minutes(5)}],
  ...

Options

• :interval — the number of milliseconds between rescue attempts. The default is 60_000ms.

• :rescue_after — the maximum amount of time, in milliseconds, that a job may execute before being rescued. 60 minutes by default, and rescuing is performed once a minute.

Instrumenting with Telemetry

The Oban.Plugins.Lazarus plugin adds the following metadata to the [:oban, :plugin, :stop] event:

• :rescued_jobs — a list of jobs transitioned back to available

• :discarded_jobs — a list of jobs transitioned to discarded

Note: jobs only include id, queue, state fields.