How to pass an exception from a WCF service to the service host?

Question

I have a WCF service.

In some scenarios, the service fails, and requires manual intervention.

I want to be able to pass the exception to the service host and cause it to fail, instead of causing only the specific call to fail.

the service is an asynchronous MSMQ service and hosted in a custom application.

So, once a call fails you want to reject all future calls until the problem is resolved? Am I understanding the scenario right? — Mike Parkhill, Nov 11 '12 at 12:18
more or less. I expect the host to catch the exception and exit. Once the problem is delt with, the service will be restarted manually. — Ophir Yoktan, Nov 11 '12 at 12:24

score 2 · Accepted Answer · edited May 23 '17 at 12:12

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This thread has a couple of ideas on how to communicate between the service and the host. Basically, you use a Singleton that both pieces can instantiate and share info on - beware of thread synchronization.

How to communicate between WCF service and host application?

Another option would be to set some flag using an IErroHandler whenever your service runs into problems then use an IDispatcherMessageInspector to check the flag before servicing any requests. It wouldn't stop the host, but it would prevent further service work until you restart.

edited May 23 '17 at 12:12

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answered Nov 11 '12 at 12:59

Mike Parkhill

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The solution I used from the thread was to add an event to the WCF service, and have the main application listen to this event. – Ophir Yoktan Nov 11 '12 at 13:52

How to pass an exception from a WCF service to the service host?

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