Thread.Abort in ASP.NET app causes w3wp.exe to crash

Question

Please do not set duplicate flag on this qustion - it is not about \"why ThreadAbortException occurs\", it is about \"why w3wp.exe process terminates after

Answer 1

I ran into this exact same problem on Windows 8.1 today, after rebooting to install Windows Updates.

The problem was that I had manually disabled RyuJIT in the Registry, due to this issue, by adding the useLegacyJit DWORD and setting it to 1 (see Method #3). But one of the updates created the UseRyuJIT key in the same location and set it to 1 as well, and this apparently confused ASP.NET horribly.

The solution was to set useLegacyJit to 0 and issue an iisreset. After that, all is good in the world.

WinDbg's !clrstack showed the following frames when I debugged the w3wp.exe dump. Perhaps this will help others with the same error who are Googling for a solution:

000000ef9892be98 00007ffa0e2d1fea [HelperMethodFrame: 000000ef9892be98] 
000000ef9892bf80 00007ff99d776588 System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32)
000000ef9892df90 00007ff9fc172345 [FaultingExceptionFrame: 000000ef9892df90] 
000000ef9892e490 00007ff99d7796c0 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(System.Web.Hosting.IIS7WorkerRequest, System.Web.HttpContext)
000000ef9892e520 00007ff99d777377 System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32)
000000ef9892e700 00007ff99d77655a System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32)
000000ef9892e740 00007ff99d775c11 DomainNeutralILStubClass.IL_STUB_ReversePInvoke(Int64, Int64, Int64, Int32)
000000ef9892ef58 00007ff9fc100b4e [InlinedCallFrame: 000000ef9892ef58] System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr, System.Web.RequestNotificationStatus ByRef)
000000ef9892ef58 00007ff99d78cc1b [InlinedCallFrame: 000000ef9892ef58] System.Web.Hosting.UnsafeIISMethods.MgdIndicateCompletion(IntPtr, System.Web.RequestNotificationStatus ByRef)
000000ef9892ef30 00007ff99d78cc1b DomainNeutralILStubClass.IL_STUB_PInvoke
000000ef9892f000 00007ff99d77756c System.Web.Hosting.PipelineRuntime.ProcessRequestNotificationHelper(IntPtr, IntPtr, IntPtr, Int32)
000000ef9892f1e0 00007ff99d77655a System.Web.Hosting.PipelineRuntime.ProcessRequestNotification(IntPtr, IntPtr, IntPtr, Int32)
000000ef9892f220 00007ff99d775c11 DomainNeutralILStubClass.IL_STUB_ReversePInvoke(Int64, Int64, Int64, Int32)
000000ef9892f418 00007ff9fc100da3 [ContextTransitionFrame: 000000ef9892f418]