Thread was being aborted

Question

I am using Server.Transfer. Everything works fine, but exception log shows following exception.

System.Threading.ThreadAbortException: Thread was being aborted.
   at System.Threading.Thread.AbortInternal()
   at System.Threading.Thread.Abort(Object stateInfo)
   at System.Web.HttpResponse.End()
   at System.Web.HttpServerUtility.Transfer(String path, Boolean preserveForm)
   at System.Web.HttpServerUtility.Transfer(String path)

Any idea to avoid above exception.

Answer 1

This exception is throw by the call to Server.Transfer in order to halt the execution of the current method - exactly the same thing gets thrown if you do Response.Redirect.

The two choices you have are:

• Catch and rethrow the ThreadAbortException / reperform the Server.Transfer
• Make sure that you only do Server.Transfer in places where it wont be caught (recommended)

EDIT: Scratch that, http://support.microsoft.com/kb/312629 has a couple of other suggestions to try, but I still recommend #2 above.

Answer 2

Caling Server.Transfer will call Response.End which always throws a ThreadAbortException. This s a "special" exception because while it can be caught in a catch block, it will always be re thrown at the end of the catch block. I would have your error logging ignore ThreadAbortExceptions.