prefect.events.subscribers

Flow run subscriber that interleaves events and logs from a flow run

Classes

FlowRunSubscriber ^{<a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/events/subscribers.py#L26" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

Subscribes to both events and logs for a specific flow run, yielding them in an interleaved stream.

This subscriber combines the event stream and log stream for a flow run into a single async iterator. When a terminal event (Completed, Failed, or Crashed) is received, the event subscription stops but log subscription continues for a configurable timeout to catch any straggler logs.

The underlying event and log subscribers own reconnection behavior. If either exhausts its retries or fails for another reason, that error is propagated.