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Sporadic .NET application crash with "Fatal Execution Engine Error"

Posted By:      Posted Date: August 30, 2010    Points: 0   Category :.NET Framework
I have a .NET application that runs for several hours.  It is a multi-threaded app that does some calculations and saves the results to the database.   On one machine in particular, it has been crashing recently with the following exception recorded in the Event Log: .NET Runtime version 2.0.50727.4206 - Fatal Execution Engine Error (6C9D7B6E) (80131506) Faulting application AnalyzerConsole.exe, version, time stamp 0x4c76d28b, faulting module mscorwks.dll, version 2.0.50727.4206, time stamp 0x4bf4c6a7, exception code 0xc0000005, fault offset 0x0011627d, process id 0x%9, application start time 0x%10. Sometimes it runs for hours without crashing, but usually it will crash eventually. I have captured a dump, and this is the call stack: > ntdll.dll!_DbgBreakPoint@0()   mscorwks.dll!WatsonLastChance()  + 0x133 bytes   mscorwks.dll!EEPolicy::LogFatalError()  + 0x23c bytes   mscorwks.dll!EEPolicy::HandleFatalError()  + 0x47 bytes   mscorwks.dll!CLRVectoredExceptionHandlerPhase3()  + 0x10dae2 bytes   mscorwks.dll!CLRVectoredExceptionHandlerPhase2()  + 0x20 bytes   mscorwks.dll!CLRVectoredExceptionHandler()  + 0xb7 bytes   mscorwks.dll!CPFH_RealFirstPassHandler()  + 0x8ac bytes   mscorwks.dll!_COMPlusFrameHandler()  + 0xb9 bytes   ntdll.d

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Faulting application name: allWin.exe, version:, time stamp: 0x4ced0caf
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Exception code: 0xe0434352
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Faulting process id: 0xf58
Faulting application start time: 0x01cb8be669f6b117
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