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IIS7 application pool crashing

Posted on 2013-10-30
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Last Modified: 2013-11-05
I am running win 2008 R2 standard.  I think it's running IIS7.

I have an application pool that just crashes almost everyday, it just stops.  So my websites are down until I manually log in and restart the app pool.

In looking at the app pool, I found these warnings that could possibly be causing the issue? It's attached.  Then I also added a small piece from the log file, which has the wrong time.  The time on the server is fine, but not sure where it's getting the time for it's logs.
The log in this location:
C:\inetpub\logs\LogFiles\W3SVC22

Has the wrong time, as local time, it was only 11:30 AM, but it shows a different time, could this have anything to do with the app pool crashing?
2013-10-30 18:27:38 GET /Resources
system2.JPG
system1.JPG
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Question by:afacts
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Expert Comment

by:Aaron Tomosky
ID: 39614072
Log time is usually UTC. So that's normal.

If it crashes at the same time, look for backup or some other scheduled thing running.

If it's more like an amount of time, maybe a number of visitors, more likely memory usage. Could be a leak.
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Author Comment

by:afacts
ID: 39614555
OK, so the time is good, but why is it UTC? Oh well.

What's strange is that if it could crash because of my backup job or something, I have multiple application pools, so why would just that one crash and not the rest of my app pools?

I believe it is time, so if it's a memory usage or leak, how do I disagnose a memory problem?
Are you stating that the physical memory in the box is bad, or how the software uses or allocates the memory is the problem?  If you're referring to the last option, how do I test that.

Either way, is anything tools I can use to test or capture what's going on, without having to call Microsoft?
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Accepted Solution

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Aaron Tomosky earned 500 total points
ID: 39614681
resource monitor is your friend. Look at memory usage of your app pool every few hours and see if it's creeping up. If so, you need to talk to your developers. They will have profiling tools they can run to trace down things.

IF you want to make it die faster, check out one of these load testers
http://www.loadui.org/
http://jmeter.apache.org/usermanual/get-started.html
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Author Closing Comment

by:afacts
ID: 39625435
Thanks, I've been talking to my web  developer and she doesn't know what's causing it.
I've downloaded some profiling tools that she's using, it's just so strange that it's crashing like this.
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