Recently when we had a lockup of Audit Manger, I noticed when I logged into the server that there was an alert in the task bar. On opening I discovered a Microsoft Visual C++ Debug Library message:
Program: C:\Program Files\IBM\Lotus\Domino\nevent.exe
Module: C:\Program Files\Lotus\Domino\ntrigger.dll
Run-Time Check Failure #2 - Stack around the variable 'marker' was corrupted.
(Press Retry to debug the application).
Hitting retry forced the domino service down and then back up.
Note: in most cases where the server locks up, I see semaphore errors that start some time in the night, are generated for hours with the server apparently still running, then the server eventual stops responding to users and I have to reboot the OS to recover the server. In this case, there were no semaphore errors so I'm thinking I intercepted the events prior to the more typical full lockup of the service. This is all supposition on my part.
I've been working with our IT staff for well over a year to try and determine if there are any processes (backups/AV/etc) that are touching ntrigger and they SWEAR everything is shut off.
I'm hoping that this specific debug error may provide some useful information from the developer that can point me in some specific direction to fix this problem.