Spring EJB's do not failover automatically

[dejanp]

Failover in EJB cluster is done on the cluster-aware stub level, not on the client Spring level. The list of servers you defined in your config is used only for jndi-lookup failover, and has nothing to do with failover once the lookup is done.

Jndi lookup of clustered ejbs will get you a home object that's aware of clustering environment and each remote method invocation will refresh the list of cluster nodes that are available in the cluster at the moment. So - if your ejbs are not configured for clustering, no amount of client-side configuration fiddling will help you.

[sonali.majumdar]

Hey, Thanks a ton ! I solved the problem finally . Upgraded to Spring 2.5.5 and used jee-jndi lookup .

[hinanaqvi]

Could you explain in detail how your problem was resolved? I am running into a similar problem but have not upgraded to 2.5.1.

[sonali.majumdar]

Hi,
I had a set of EJB's on the server side and used Spring to look up the EJB's from the client side. The problem was if the stub was being downloaded from one m/c, automatic failover to another m/c would not happen even though Spring had all the addresses. The problem is the JNDITargetFactorybean is a simple bean which does a simple JNDI look up. Also, the EJB's should be clustered.

[sonali.majumdar]

Hi,
I am using the jee-jndi tag foe failover between servers as following:

<jee:jndi-lookup id="sampleBean"
             jndi-name="ejb/sampleBean/remote"
             cache="true"
             resource-ref="true"
             lookup-on-startup="true"
             expected-type="com.sampleBean">
             <jee:environment>
    	java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
     	java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
       	java.naming.provider.url=jnp://3.62.33.24:1099, jnp://3.45.23.23:1099
    </jee:environment>
  </jee:jndi-lookup>

The time for failover between two servers is quite high. Even though the failover happens eventually. Is there some way , I can configure the time for failover ? Somewhere the minimum. maximum or the default is specified ?

Thanks,