App Pool crash due to some thread is calling the TerminateProcess function to kill the process in ntdll.dll

[Kishore_228]

Hi,


The App Pool, which is linked to our application, is getting crashed once or twice in a day in one of the production environments (OS: Windows server 2016). I have enabled the application trace and that didn't provide any clue of failure/exception/error so I believe there is no issue with the application. The same application works fine on other production accounts.


I have then installed the Debug Diagnostics Tool on that environment and added a Crash rule for the App Pool and collected the dumps. I have analysed the debug dumps and found that there is an exception in ntdll.dll


The following threads in w3wp__XXXXPool__PID****__Date****_17_2019__Time_01_11_03PM****__Ntdll!ZwTerminateProcess.dmp are calling theTerminateProcess function to kill the process.


Call Stack


ntdll!NtTerminateProcess

KERNELBASE!TerminateProcess+27

our ISAPI Extension!DllUnregisterServer+2d8f0

our ISAPI Extension!DllUnregisterServer+2d945

our ISAPI Extension!DllUnregisterServer+2b661

our ISAPI Extension!DllUnregisterServer+2458a

our ISAPI Extension!DllUnregisterServer+26bb8

our ISAPI Extension!DllUnregisterServer+2895f

our ISAPI Extension!DllUnregisterServer+8ed3

our ISAPI Extension!DllUnregisterServer+906b

our ISAPI Extension!DllUnregisterServer+29765

our ISAPI Extension!DllUnregisterServer+297ef

kernel32!BaseThreadInitThunk+24

ntdll!__RtlUserThreadStart+2f

ntdll!_RtlUserThreadStart+1b






Any help in resolving this problem would be appreciated.



Thank you in advance,

Kishore

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