we have a 2node OES2 Linux SP2 cluster.

During the upgrade to SP2, one of the nodes had an issue with patching,
as Rug was so slow, we decided it was easier to rebuild.

Since the rebuild the server runs fine. However when in the cluster,
every couple of days a poison pill is sent from the master server.

If I take either server out of the cluster, the single node cluster will
run fine without any problems. ie I don't believe there is network
outage to cause the poison pill

Any thoughts?