Cold Fusion MX 7 MultiServer Cluster Question

Hey all,
I've configured 2 Cold Fusion MX 7 servers running 2
instances each. I've configured a cluster between them and have the
Proxy Listener up and running.
When I access the page, everything comes up just fine... but
when I round robin between them, I'm losing my session.
I've enabled J2EE Session variables, I enabled the load
balancing of sessions in the JRun admin console on the machines.
What am I doing wrong? I know the session is being written
the machine(s) because I can see them in the directories on the
servers.

We've been having a similar issue, with occasional pages
hanging for hundreds of seconds at that same
JrppBufferedOutputStream, which SeeFusion identifies as "Writing
completed page back to the Web server".
This happens randomly throughout the day, more often when
there's more traffic, but also in the wee hours with relatively few
visitors; nothing else appears to be going on, often with the
long-running thread the only active thread.
Our setup is pretty similar to yours, CFMX7, MSSQL2000,
Win2k3 Server, but with dual Xeons instead of single-CPU. We've
applied the significant hotfixes, including the DST update to the
1.4.2_11 JVM. I'm not positive we've updated to the latest IIS
connector (as mentioned in
http://www.adobe.com/support/security/bulletins/apsb07-02.html),
but will be checking, just to be sure. If you also don't have the
newest connector installed, that would be an interesting
commonality.
We had problems in the past with CF locking up completely
during one of these hung threads, but after some tweaking to
stabilize memory usage below 80%, the lockups are rare.
So I have no answer, but will be sure to share any solution
we do find with you, and hope you'll do the same! :*)

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