Bug: Subscription Exception and checkpoint about eventuous HOT 1 CLOSED

There was a bug that caused the dropped subscription to skip one event. It was fixed here: 9f4cb7a

There are two places where the subscription stores the checkpoint.

First is when a system event is ignored:
https://github.com/Eventuous/eventuous/blob/master/src/Eventuous.Subscriptions/SubscriptionService.cs#L78-L82

The second is after processing an event:
https://github.com/Eventuous/eventuous/blob/master/src/Eventuous.Subscriptions/SubscriptionService.cs#L106

In case of an exception in event processing, the _lastPosition is not updated and it's deliberate. This field is only used to report the processing gap. There's no intention in the code to retry processing the event as it's the responsibility of an event handler. If you want the subscription to throw and stop, you can set the ThrowOnError option to true.

So, how it's done now is by design. However, the next release would change the checkpoint management entirely. Therefore, I am closing this issue. The subscription docs would also be published only when the next release is out, as it makes no sense to document things that are going to change.

from eventuous.