Questions on Clustering 2006-03-20 - By Edoardo Causarano
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Hello list, I have some questions on Tomcat 5.5.15 clustering. The apache
httpd server connects to the cluster members with mod_jk. All the cluster
members have the jvmRoute attribute set to the same value "cluster" as well
as the same multicast group. Multicast routes are activated on the
appropriate network interfaces with the command:
route add -net 224.0.0.0 netmask 240.0.0.0 dev eth1
On the server logs I get these messages:
1616281 [Cluster-MembershipSender] DEBUG
org.apache.catalina.cluster.mcast.McastService  - Mcast send ping from member
org.apache.catalina.cluster.mcast.McastMember[tcp://127.0.0.2:4001,catalina,127
.0.0.2,4001,
alive=100]
1616282 [Cluster-MembershipReceiver] DEBUG
org.apache.catalina.cluster.mcast.McastService - Mcast receive ping from
member
org.apache.catalina.cluster.mcast.McastMember[tcp://127.0.0.2:4001,catalina,127
.0.0.2,4001,
alive=1612675]
I'm a bit surprised by the loopback addresses... does this mean that the
server is only reading itself on the multicast group?
How can I verify that the cluster members are properly acting in sync? Must
the directories for temporary deployment exist BEFORE launching Tomcat?
Thank you,
e
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