IIS 8 (w3wp.exe) periodically crashes due to a memory access violation in ISAPI module (disp_iis.dll).
This issue happens when a request:
- is declined by the dispatcher (because e.g. of its /filter settings)
- internally redirected to an error page
- that error page is again declined by the dispatcher
On too many subsequent errors, the Application Pool may stop, depending on its RapidFailurePolicy.
Upgrade the dispatcher to version 4.2.4.
** At the time of writing this article, only Dispatcher 4.2.3 is not publicly available yet. For a pre-release build of Dispatcher 4.2.4, contact the AEM support team.