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Dealing with Faulted Messaging Objects

Updated: March 19, 2014

It is widely known among many Windows Communication Foundation (WCF) developers that a WCF communication object is subject to a special precaution in order to handle internal state transition; in particular, those situations in which the WCF object ends up in a faulted state. Often, the WCF communication stack is required to be reset, for instance, by recreating a client channel, in order to recover from this condition.

The brokered messaging API provides “out-of-the-box” resilience against the faulted communication objects by handling and recovering from conditions that can make the underlying communication objects unusable. Unlike traditional WCF clients, Service Bus messaging clients that leverage the brokered messaging API don’t need to implement any special logic in order to deal with faulted communication objects. All communication objects such as MessagingFactory, QueueClient, TopicClient, SubscriptionClient, MessageSender, and MessageReceiver will automatically detect and recover from exceptions that could potentially bring the communication stack into a non-operational state.

Certain messaging operations such as Complete, Abandon and Defer will not be able to provide a seamless automatic recovery. If Complete() or Abandon() fail with the MessagingCommunicationException exception, the only recourse is to receive another message, possibly the same one that failed upon completion, provided a competing consumer didn’t retrieve it in the meantime.

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