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From Jeff Genender <jgenen...@apache.org>
Subject Re: Session replication in Geronimo clustering
Date Wed, 29 Mar 2006 14:23:43 GMT
Did you read this and follow along?

http://opensource.atlassian.com/confluence/oss/display/GERONIMO/Geronimo+Clustering+Example

Following the steps in the link should yield you replication.

Jeff

Phani Madgula wrote:
> Hi,
>  
> I have been trying to use tomcat clustering with Geronimo for a customer
> application. Sometimes, I face the following problem.
>  
> 
> I downloaded apache2.0.54 and mod_jk_1.2.15 and tested clustering. I
> have three machines on a same subnet one windows and other are linux
> boxes. I have also enabled IPMulticast and no firewalls between systems.
> 
> To my observation, session replication is not working. However,
> loadbalancer is able to fail-over successfully.
> 
> When I shutdown the instance which is serving the HttpRequests, it will
> throw an exception stating "not able to start cluster listener" and also
> "no active members in the cluster"
> 
> 11:09:10,572 DEBUG [WebappLoader] Stopping this Loader
> 
> 11:09:10,573 ERROR [ReplicationListener] Unable to start cluster listener.
> 
> java.lang.NullPointerException
> 
> at
> org.apache.catalina.cluster.tcp.ReplicationListener.listen(ReplicationListener.java(Compiled
> Code))
> 
> at
> org.apache.catalina.cluster.tcp.ReplicationListener.run(ReplicationListener.java:125)
> 
> at java.lang.Thread.run(Thread.java:570)
> 
> 11:09:10,573 DEBUG [StandardContext] resetContext Geronimo
> :j2eeType=WebModule,name=//localhost/servlet-examples-cluster,J2EEApplication=none,J2EEServer=none
> null
> 
> 11:09:10,575 DEBUG [StandardContext] Stopping complete
> 
> or
> 
> 11:03:07,998 INFO [DeltaManager] Manager [/servlet-examples-cluster]:
> skipping state transfer. No members active in cluster group.
> 
> I have tested with both mod_jk_1.2.14 & mod_jk_1.2.15, but failed.
> 
> Any ideas on why this error comes?..
>  
> Thx
> phani

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