Masstransit error queue is consuming, but still is not empty

问题

I am using Mastransit 3.5.0 with RabbitMq. If queue consumers throws exception, its is handled by default MoveExceptionToTransportFilter and moved to _error queue. For _error queue I have seperate consumer: Consume(ConsumeContext> context)

Behavior of Fault is rather different. Part of errors are handled and removed from _error queue, but part of error message still remain in error queue and do not consumed by this consumer. As I understand If I have Fault consumer then _error queue should be empty.

I can not find explanation, why errors are still in queue. Maybe because these faults were once consumed, but I cant find any indication in the headers or else where?

回答1:

This is not correct.

1. You should not consume from the error queue. Error queue accumulates messages that crashed their consumers, for diagnostics purposes.

2. Faut<T> messages are published in addition to moving messages to the error queue. These two things are unrelated.

3. If you have a consumer of Fault or Fault<T> events, you just do that - consume these events. It has nothing to do with messages in the error queue.

来源：https://stackoverflow.com/questions/46128546/masstransit-error-queue-is-consuming-but-still-is-not-empty