bdillingham
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OWA on front-end server periodically stops functioning
We have OWA running on a front-end server in our DMZ, connecting to one back-end server and both running Exchange 2003 SP2. Periodically, OWA stops functioning but no services stop on either server, and all other mail flow is unaffected. The only way to get OWA working again is to reboot the back-end server. The server logs show no issues, and the IIS logs only show 500 errors when users attempt to login after OWA stops working. This is a random occurence, happening twice in the past 3 months, but only once before that in the past year. Any help would be greatly appreciated.
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It's difficult to diagnose exact what could be the problem since its taking place with such less frequency.
Ideally, I would place perfmon on the server to understand what is going wrong "at the particular time of the incident"
Apart from that it is pretty difficult to guess, unless some astrologer is consulted on this issue.
Ideally, I would place perfmon on the server to understand what is going wrong "at the particular time of the incident"
Apart from that it is pretty difficult to guess, unless some astrologer is consulted on this issue.
ASKER
And now you see my delima! :) I'll give the monitoring a shot and see what we come up with.
Wow - that would be a wait for another 2 mths :)
Njoi.
Njoi.
ASKER
Update: The issue has occurred a couple more times since my last post. After using your suggestions as a good starting point, I dug into the system and it turns out the non-paged pool memory was being exhausted on the back-end server, and that was causing the system, specifically OWA, to stop responding. I ended up removing the /3GB and /userva=3030 switches from boot.ini to give more resources back to the OS. This seems to have resolved the issue, at least for now. This is one of those issues that doesn't materialize every week, even though it was happening with more frequency lately. Sometimes the "best practices" aren't applicable in every situation. :) Thanks for your help.
ASKER