CF4.5 uses 100% CPU and hangs

[Ping4U]

Hello,

According to the ColdFusion Forums my problem is not a new one but I still want
to post it with the hope to get some kind of answer.

I'm are running the following system:

CF 4.5 Enterprise Server

SiteMinder 6.0

IIS 5.0
MS SqlServer 2005

Both the CF and database server are Win2000 SP4.

About every one hours the CF server uses 100% CPU and from than on it is
impossible to log into the application. The site is still available though.
After restarting the CF service everything works fine until.....

I do not know what triggers this but I suspect it has something to do with
SiteMinder and logging onto the application.

The site has to go live on Monday so you can imagine the pressure to get
this fixed before the weekend.

Greetings,

Jilani

[Guest]

Unfortunately I don't think you'll like the stock answer which is UPGRADE!. 4.5 is a VERY old version - I started out on that over a decade or so ago AFAIK.  Not many people will be running it and it doesn't have active support any more.

It's like asking for support from Microsoft for WFW 3.11 or DOS.

Sorry

[Ping4U]

Many Thanks for your suggestion Grumpy Joe.

I too agree with your words.

But the application which I am working is already in Live since 1999

and it is still working with the same version.

It is impossible to upgrade the Coldfusion because it is already in

Live box and working fine.

Recently we have deployed the SiteMinder in Live box, after installing

the SiteMinter agent CF server is shooting up to 100% CPU utilization.

if I remove the SiteMinder then CF server is working with normal

conditions. But when SiteMinder is available CF server is shooting up

to 100% again.

When we have checked with the SiteMinder team, they said the problem

is in CF server so they can't do any thing.

Please help to resolve this issue.

Greetings

Jilani

[Charlie Arehart]

Jilani, you mention that this seems connected to SiteMinder. Do you mean you have your own version of SiteMinder, separate from the built-in one that came with CF 4 and 5? I wonder if there could be a conflict between them. Why are you using the full SiteMinder? And do you really need it?

More curious is that you say this spike happens every hour. Can you confirm if it's every 67 minutes, specifically? If so, then I would assert that this could be a problem related to the client variable purge process, which I discuss here:

http://www.carehart.org/blog/client/index.cfm/2006/10/4/bots_and_spiders_and_poor_CF_performance

But that may not be the issue if simply enabling/disabling the siteminder service will immediately recreate your problem....unless somehow the DB used by SiteMinder is the same DB used for client variables. Do you have any datasources listed in the CF Admin page for client variables? Any chance there's a connection between them and siteminder?

/charlie

PS This whole issue of client variables and how they can hurt you unexpectedly is something I'll dicuss this Thursday at noon US EDT, when I present "Clients and Sessions and Crashes, Oh My", to the online ColdFusion Meetup: www.coldfusionmeeetup.com.