Security :: CurrentPrincipal In Background Threads?

Dec 20, 2010

I have a web application hosted in IIS 7.5 and expose its functionality using web services. The web application has state the the first thing I do is to call a web service method to start it all up. As a consequence several threads are created and these threads run until the system is stopped. All recycling of application pools and such is disabled! To access the web services the calling client must authenticate (using basic auth and local windows users). Thus, an incoming request has the CurrentPrincipal set. The logging subsystem is setup to tag all log messages with the current principals identity name and this works just fine for code that runs on an the thread of on incoming request. But, it doesn't work at all for all of my background threads. The current principal is still set in these threads but the identity objects name has been disposed. Why is this? What can I do to fix this. I would really like to get all log messages tagged with the current principal. It also seems impossible to detect if the identity name instance has been disposed without trying to access it and catch the exception which is highly annoying.

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