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[Linux-cluster] cluster with mixed versions



When upgrading my test cluster from 2.6.8.1 to 2.6.9,
I rebooted my cluster 1 node at a time.

I noticed that the 2.6.9 node did not join the cluster
with the 2.6.8.1 nodes.  When I reboot the 2nd node to
2.6.9, the 2 nodes running 2.6.9 formed a cluster, but
the 3rd node running 2.6.8.1 was left in his own cluster
without quorum.

Does this mean one cannot have a cluster of mixed versions?

This seems like it could be a problem for rolling upgrades
(not a big deal right now).

Daniel


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