When I log into the Web Console it indicates that 4 servers in the cluster are "down". When I go to the server node tab I see that each server is "pend" (yellow) rather than "up" (green). I went to each of the machine nodes and the couchbase-server is running. How long does it take for the cluster to "notice" that the servers are actually up? Can this be done manually? I know I could remove each of the server nodes and add them back in but that would entail re-balancing and it would be very time consuming. Besides, I also have a significant amount of data on this cluster and I would rather not lose it.