Wednesday, August 3, 2011

Multicast Routing issues in Ganglia

Sometimes the Gmond process does not start and spews the following error.
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gmond -d 10
udp_recv_channel mcast_join=10.16.101.81 mcast_if=NULL port=8664 bind=10.16.101.81
Error creating multicast server mcast_join=10.16.101.81 port=8664 mcast_if=NULL family='inet4'. Exiting.
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This happens due to some multicast routing issues. I am not sure exactly what is causing this problem. The fix is to explicitly add a route.

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route add -host 239.2.11.71 dev eth0

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Need to learn what is causing this problem though..