Capture username with log4net

Question

I currently write all log4net events to a database, and it seems to work just fine. To capture the logged in user account I use this piece of code:

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Answer 1

This is pure speculation, but this sounds very much like it could be an issue related to shared request threads i.e. ThreadPool threads. When you set an MDC value it is associated with the current thread, and that thread will be returned to the ThreadPool at the end of the request and then re-used for subsequent requests. If the value is not overwritten, then you could see old values on new requests.

Consider managing this data in request start and end events, where you can set the username when a request starts, and then clear it on request end. This should give this data the correct lifetime i.e. for the lifetime of the request.