w3wp.exe using almost 100% of CPU on Windows Server 2003

w3wp.exe is using up most of the CPU on our Windows 2003 Standard server. This seems to have developed over the past week.

Any idea what the problem is?
edison04Asked:
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Seth SimmonsSr. Systems AdministratorCommented:
do you have a significant amount of web traffic?
if you restart IIS do you see the same cpu spike again?
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edison04Author Commented:
No significant amount of traffic.

Yes, it reoccurs.
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ITguy850Commented:
Have you tried to run process explorer to get more details on the process causing it. Do you have multiple iis sites running on your server?
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edison04Author Commented:
There were many iis sites running on the same application pool. After changing mine to its own application pool, I was able to discern that it was my own app that was causing the problem with iis.

Since I was unable to step through my code because of internet restrictions on the development server, I used WinMerge to compare my current code with an older version and found the offending section of code.

Thanks for your help!
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Windows Server 2003

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