On one of the servers we are running, it is experiencing frequent hang up
with the "unable to response due to high traffic" message and it stays. The
CF Application Server service will need to be stopped and restarted to get
the site running again. I have not noticed the same happening on the other
servers running the same code. However, from monitoring the activities, one
symptom I notice is that a lot of CFHTTP calls made by this server sometimes
may exceed several minutes or even timed out (which it is understandable on
the receiving backend because of long queries, processes, service offline,
etc). There seems to be some coincidences on the occurrences of the long
CFHTTP process and the time the server encountering the high traffic error.
But it is not consistent. One theory we come up with is that because of the
multiple long CFHTTP calls, CF threads are tied up. Then, when the CFHTTP
calls timed out, there may be memory leak or for some reasons the threads
are not released and so the CF server runs out of resources for the next
execution - even for a simple CFM page (hence the high traffic).
That's our theory while we are still trying to figure it out.
Any suggestions or comments on what we can do or look at?
Or did anyone encounter similar problem before?
Thanks.
Benjamin Wai
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