Debug Diagnostic analysis

Hi

I am attaching latest analysis.

Please help as I am not able to think further...

I have attached file in .txt, please rename to .mht before viewing

Hello,
Can you execute some commands in windbg? WinDbg is a part of "Debugging Tools for Windows" (http://www.microsoft.com/whdc/devtools/debugging/default.mspx).
Run WinDbg.exe, File -> Open Crash Dump (select dllhost.exe__P41__PID__2620__Date__08_05_2009__Time_04_02_43PM__525__Manual Dump.dmp), in command window enter following commands:
lm vm mscorwks
.loadby sos mscorwks
!threads
~9s
kb250
after that, Edit -> Write window text to file. And post saved file here.
I repeat that information from perfomance counters would be useful

Hi roman2

I did as you described. Posting the file here.

Hello,
sorry, I forgot about symbols. If the system in question does not have an Internet connection, you have to copy the dump file on system which does. After that, you have to install "Debugging Tools for Windows" and create directory c:\symbols there. Presumably, debug symbols are present in your system, but I don't know where Debug Diagnostics tool found them. Run WinDbg.exe, File -> Open Crash Dump (select dllhost.exe__P41__PID__2620__Date__08_05_2009__Time_04_02_43PM__525__Manual Dump.dmp), in command window enter following commands:
.sympath srv*c:\symbols*http://msdl.microsoft.com/download/symbols
.reload
.loadby sos mscorwks
!threads

Hi
Attaching file after loading symbol info

Hello,
I think one of the web-requests was slowly handled. Let us check this:
.sympath srv*c:\symbols*http://msdl.microsoft.com/download/symbols (if necessary)
.loadby sos mscorwks
~55s
kb250
!clrstack
!dso

Done this.

File attached.

Hi Roman2

I see that this command listed 0ee0eac0 055b4ea8 System.Web.HttpUtility+UrlDecoder

Can this be culprit. I looked at the code and there is a loop around this method:

while(signature.Contains("%"))
{
    signature = System.Web.HttpUtility.UrlDecode(signature);
}

while (parts[0].Contains("%"))
{
    parts[0] = System.Web.HttpUtility.UrlDecode(parts[0]);
}

Might be this is going into infinite loop.

attached file

Hello,
you absolutely right. I wrote test project and his execution infinitely loops:
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;

namespace UrlDecode
{
    class Program
    {
        static void Main(string[] args)
        {
            string signature = @"a_osch%~"; // was took from dump
            while (signature.Contains("%"))
            {
                signature = System.Web.HttpUtility.UrlDecode(signature);
            }
        }
    }
}