Dead letters

[Mikael Johansson]

Hello,

I have a message that gets moved to the _Skipped queue with the reason dead letters.

When reading up abit I found https://www.rabbitmq.com/dlx.html and I quickly understood that dead letters can happen for several reasons.

Is there any way to find out whats the reason was for moving it to the _skipped queue? According to my link there should have been a reason on the message. 

But with MT there only stands MT-Reason: Dead letter.

[Alexey Zimarev]

MassTransit moves messages to dead letter (_skipped) queue if there is no consumer for the message but there is a binding between the message type exchange and endpoint exchange.

This usually happens, when you used to have a consumer for some message type at an endpoint, but then removed it. The binding is not automatically removed, so messages keep coming, but since there is no consumer - they are moved to the dead letter queue.

[Mikael Johansson]

Thanks for taking some time for us Alexey

It sounds reasonable that there could be an old consumer not removed so I did remove all my queues and exchanges. 

However even after that the issue is still there. Also it is only happening when I send a specific event and only every second one.

Obviously it must be something in our code, but I am confused. Any idea around how to investigate this issue? 

[Chris Patterson]

Code examples on GitHub, or snippets, get live support in the Gitter.im chat room.

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[Mikael Johansson]

I did find the reason after a while. We did register two buscontrolers and one of them did not setup the consumers. 

But thanks for your reply! 

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