4 Replies Latest reply: Aug 13, 2010 12:24 PM by johnstok - RSS

How do I correctly configure HTTP session replication?

johnstok - Newbie

Environment

Apache 2.2 + mod_proxy

jBoss 5.1

Ubuntu Server

 

jBoss parameters

/usr/local/jboss/bin/run.sh -c all -b 195.188.148.230 -u 233.3.4.5 -g foo &

/usr/local/jboss/bin/run.sh -c all -b 195.188.148.232 -u 233.3.4.5 -g foo &

 

Detail

I'm having trouble getting HTTP session replication working. I have created a cluster with two nodes on separate machines and configured a shared multicast address and group name. The servers seem to be detecting each other and joining the cluster:

 

11:52:42,233 INFO  [foo] New cluster view for partition foo (id: 1, delta: 1) : [195.188.148.232:1099, 195.188.148.230:1099]
11:52:42,236 INFO  [foo] I am (195.188.148.232:1099) received membershipChanged event:
11:52:42,237 INFO  [foo] Dead members: 0 ([])
11:52:42,238 INFO  [foo] New Members : 1 ([195.188.148.230:1099])
11:52:42,238 INFO  [foo] All Members : 2 ([195.188.148.232:1099, 195.188.148.230:1099])
11:52:52,092 INFO  [GroupMember] org.jboss.messaging.core.impl.postoffice.GroupMember$ControlMembershipListener@2c31da got new view [195.188.148.232:46104|1] [195.188.148.232:46104, 195.188.148.230:55809], old view is [195.188.148.232:46104|0] [195.188.148.232:46104]
11:52:52,092 INFO  [GroupMember] I am (195.188.148.232:46104)
11:52:52,092 INFO  [GroupMember] New Members : 1 ([195.188.148.230:55809])
11:52:52,092 INFO  [GroupMember] All Members : 2 ([195.188.148.232:46104, 195.188.148.230:55809])

 

I am deploying the same EAR file to both nodes via JMX (using the Maven jBoss plugin). The EAR contains a WAR file and the web.xml file contains the <distributable/> element. The WAR is mounted at the '/cc7-latest' context.

 

When I connect to one of the nodes a session is created as expected. Checking the host=localhost,path=/cc7-latest,type=Manager JMX bean (via jmx-console) for the first node the 'ReplicationStatistics' property has a value like:

 

[sessionID: 60JoDvnKRVd98nwd-swWdA__, replicationCount=1, minPassivationTime=0, maxPassivationTime=0, totalPassivationTime=0, minReplicationTime=7, maxReplicationTime=7, totalReplicationlTime=7, loadCount=0, minLoadTime=9223372036854775807, maxLoadTime=0, totaLoadlTime=0];)

 

The second node only has the value ) (ie no sessions).

 

Also, on both nodes the config=standard-session-cache,jmx-resource=RPCManager,service=Cache JMX bean reports the property 'ReplicationCount' to be 0.

 

Question
Any ideas why replication might not be happening?