NullReferenceException in ExclusiveConsumer.Dispose

Hello,

following scenario:

• one exclusive queue
• two cosumers trying to connect to that queue

when the second consumer tries to connect to the exclusive queue i get an ConsumerError as expected.

When i now try advancedBus.Dispose i get this exception and the connection to my RabbitMQ server is not closed:

System.NullReferenceException: Object reference not set to an instance of an object.
   at EasyNetQ.Consumer.ExclusiveConsumer.Dispose() in C:\Projekte\EasyNetQ-3.4.0\Source\EasyNetQ\Consumer\ExclusiveConsumer.cs:line 122
   at EasyNetQ.Consumer.ConsumerFactory.Dispose() in C:\Projekte\EasyNetQ-3.4.0\Source\EasyNetQ\Consumer\ConsumerFactory.cs:line 91
   at EasyNetQ.RabbitAdvancedBus.Dispose() in C:\Projekte\EasyNetQ-3.4.0\Source\EasyNetQ\RabbitAdvancedBus.cs:line 931
   at Fso.Sync.Service.EasyNetQueue.Close() in C:\Projekte\fso\fso-sync-service\Fso.Sync.Service\EasyNetQueue.cs:line 186

After looking at the sourcecode i see that consumerCancellation is null

[rtaylor01]

I have not started using the updated version of EasyNetQ yet so I don’t have a code example to give to you.

From: Yury Pliner [e-mail] Sent: Tuesday, March 12, 2019 3:04 PM To: EasyNetQ/EasyNetQ [e-mail] Cc: Robert Taylor [e-mail]; Mention [e-mail] Subject: Re: [EasyNetQ/EasyNetQ] NullReferenceException in ExclusiveConsumer.Dispose (#904)

@rtaylor01https://github.com/rtaylor01 Could you help us and tell how you use that cancellation? It would be better if you could show the code.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/EasyNetQ/EasyNetQ/issues/904#issuecomment-472139270, or mute the threadhttps://github.com/notifications/unsubscribe-auth/Ai-CGOIK7pcqYlrAEfSQZFzLdekkqgcgks5vV_okgaJpZM4bE6cO.

[Pliner]

Thanks.

I confirm we have a bug and it was caused by #875, but I’m not sure consumerCancellation?.OnCancel(queue); is nice fix.