Hi,
After showing this error, two controllers are partitioned.
Actually they never saw each other and they were never in a group.
Make sure that your switch supports UDP multicast. You can use the
JGroups demo and test your network config until the demo works. Once you
have your network settings right, you can try to use Sequoia.
If you are using Linux, make sure that your kernel supports IP multicast.
Use a tool like tcpdump or ethereal to check how packets are routed on
your machine.
Hope this helps,
Emmanuel
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 <http://224.0.0.0> netmask 240.0.0.0
<http://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 <http://10.60.10.0> * 255.255.255.0
<http://255.255.255.0> U 0 0 0 eth0
192.168.10.0 <http://192.168.10.0> * 255.255.255.0
<http://255.255.255.0> U 0 0 0 eth2
224.0.0.0 <http://224.0.0.0> * 240.0.0.0
<http://240.0.0.0> U 0 0 0 eth2
default 10.60.10.1 <http://10.60.10.1> 0.0.0.0
<http://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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Emmanuel Cecchet
FTO @ Frog Thinker
Open Source Development & Consulting
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Web: http://www.frogthinker.org
email: [EMAIL PROTECTED]
Skype: emmanuel_cecchet
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