Actually, I think what your seeing here is not that the clustering is
breaking, but rather that the JRun/IIS connector piece is dying. I'm
running clusters in all of my shared environments and experience this
very infrequently. All of them are Win2k3 RC2 (though they were
previously Win2k). The only time I ever have issues is if IIS just
plain hangs. But when IIS hangs, it's never in a good way ;). If it's
still possible to open a the communication port, our hardware load
balancer thinks that the server is alive. But since IIS is stuffed up,
the JRun connector piece never really gets called. If the JRun
connector doesn't get called, clustering won't function. We've now
taken to having a {server}/alive.htm file that is pinged every 5 seconds
by the hardware load balancer to ensure that IIS hasn't died in addition
to the software JRun clustering. If the hardware load balancer can't
get through to the alive page then the server is taken out of the
hardware balancing cluster.
Matthew Williams
Geodesic GraFX
www.geodesicgrafx.com/blog
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