After showing this error, two controllers are partitioned. I am using Appia for UDP multicasting. When I type "enable <backend>" from the other controller, the prompt is stuck and the console shows a bunch of nakfifo.multicast.NakFifoMulticastSession nacked. And then, controllers are partitioned each other. They don't see each other finally.
I was testing how to replicate a virtual database to two controllers. Each virtual database conf. was setup to use one backend of a different node, with RAIDb-1 type. First time, I tries to solve this problem by using 'JGroups'. But, jgroups also was stuck at 'enabling the backend'. So, I moved to 'Appia'. Appia seemed to work with TCP setup. Yes, it worked. But, it does not work with UDP multicasting. I turned off firewalls. So, this is not firewall problem. I added the entry in routing table, such as: /sbin/route add -net 224.0.0.0 netmask 240.0.0.0 dev eth2 Following is my routing table of a controller Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.60.10.0 * 255.255.255.0 U 0 0 0 eth0 192.168.10.0 * 255.255.255.0 U 0 0 0 eth2 224.0.0.0 * 240.0.0.0 U 0 0 0 eth2 default 10.60.10.1 0.0.0.0 UG 0 0 0 eth0 Actually, I wanted to use gigabit ethernet for all products communication. So, I forwarded gossip and udp packets to eth2, gigbit ethernet. When I used TCP setup, it used eth0 wholly. What is the problem?
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