We have a farm of 5 Windows Server 2012 R2 servers, running IIS.
Under load, one website start failing every ~75 seconds and it keeps going on and on, until load goes down at night time.
Only thing we have to go after, is the message in the evenlog :
Faulting application name: w3wp.exe, version: 8.5.9600.16384, time stamp: 0x5215df96 Faulting module name: clr.dll, version: 4.0.30319.34209, time stamp: 0x5348a1ef Exception code: 0xc00000fd Fault offset: 0x000000000001ff16 Faulting process id: 0x73d0 Faulting application start time: 0x01d31e49290c950a Faulting application path: c:\windows\system32\inetsrv\w3wp.exe Faulting module path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll Report Id: 8a491461-8a3c-11e7-80e8-d89d6731bc04 Faulting package full name: Faulting package-relative application ID:
If I look at the "Workers" inside IIS, I just see a bunch of requests and the wait time keeps going up and up when I press F5 - until the process is crashing/restarted.
Any advise ?
The application is written in C#/VB, and uses controls from Telerik, saves data inside a Sql Server and caches via a distributed nCache running on 5 servers.
The application has been running for months without updates, other that patches to the OS regularly.
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