We had migrated a calssic ASP application from IIS 5.0 to IIS 7.0 a little while back. As time goes on, I am seeing greater system utilization as a whole on the IIS 7 box than we ever really did on the IIS 5 box. I also have ASP error being logged to the Windows Event log, and have been noticing a fair number or errors on a regular basis - on top of which, every now and again we will start to get strange random errors from ASP pages... like DB connections failing for no apparent reason, etc.
So, I am starting to take a close look at all of this to try and determine root causes.
I have enabled Failed Request Trace Logging, and have been reviewing these logs all day today. One thing I am seeing quite a bit of is :
ASP_CLIENT_DICONNECTED
ASP_LOG_ERROR LineNumber="", ErrorCode="ASP 0147", Description="500 Server Error"
This seems to happen for random ASP pages with random querystrings... I am not able to see any patterns to it...
Anyway, I have not found too much information on this error and how to properly interperet it. TechNet says: "The client disconnected while the request was on the ASP queue." which is great, but not all that verbose.
What could cause clients to disconnect so frequently in this manner? Networking in general seems to be fine on the server - NIC / drivers / cables / switch, etc. all seem good.
If anyone has any advice or experiences I would greatly appreciate it...
D