I have a rather strange problem.  I have two RedHat machines running
Tomcat in a clustered arrangement.  I am using the built in Cluster
element from tomcat 5.5.4.  When idle, the machines seem to be working
fine.  In fact, even under a slight load the machines perform well.  I
can open up a terminal and use tcpdump to listen to the multicast ip
and both machines are present with heartbeats.  The FarmWarDeployer,
although somewhat buggy, is also working.  However, when subjected to
a heavy load, one of the machines stops multicasting.

Machine 1 is a dual Athlon MP with 2 gigs of RAM
Machine 2 is a single P4 with 1 gig of RAM

It is machine 1 that stops multicasting.  I have tried a number of
things.  I tried renicing tomcat thinking that it was hogging all of
the system resources.  This did not work.  I tried a different NIC
thinking that may be the problem.  This did not work either.  In fact,
both machines now use the same NIC and same module (e100).

Does anyone have any ideas?

-Ian

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