Hi Guys

We are running some asp.net(3.5) applications on the Windows2008 r2, IIS7.5. Recently we got some event logs so difficult, we have not idea hope some guys can help.

1.EventID: 1334 (9-1-2011 8:41:57) Error message

An error occurred during a process host idle check. Exception: System.AccessViolationException Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. StackTrace: at System.Collections.Hashtable.GetEnumerator() at System.Web.Hosting.ApplicationManager.IsIdle() at System.Web.Hosting.ProcessHost.IsIdle()

2.EventID: 1023 (9-1-2011 19:44:02) Error message

.NET Runtime version 2.0.50727.4952 - Fatal Execution Engine Error (742B851A) (80131506)

3.EventID: 1000 (9-1-2011 19:44:03) Error message

Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bcd2b Faulting module name: mscorwks.dll, version: 2.0.50727.4952, time stamp: 0x4bebd49a Exception code: 0xc0000005 Fault offset: 0x0000c262 Faulting process id: 0x%9 Faulting application start time: 0x%10 Faulting application path: %11 Faulting module path: %12 Report Id: %13

4.EventID: 5011 (9-1-2011 19:44:03) Error message

A process serving application pool 'AppPoolName' suffered a fatal communication error with the Windows Process Activation Service. The process id was '2552'. The data field contains the error number.

5.some info: we got the memory.hdmp(234MB) and minidump.mdmp(19.2) from control panel >> action center but I donot know how to use that :(