[jboss-user] [Clustering/JBoss] - Re: Issues with SFSB state replication and bean passivation

[bstansberry@jboss.com]

Short answer -- maybe, depends on how you use your EJB. :-)  Long answer:
 
There are 3 areas of load balancing involved with SFSBs:

1) Load balancing of the JNDI lookups of the EJB home.  You get this by configuring your naming environment properties such that you are using HA-JNDI. Whether the things you are looking up are configured for clustering or not makes no difference at all here.

2) Load balancing of calls made by the EJB home.  You only get this if the EJB is configured as clustered.  Hence my question about caching homes. If you don't cache homes, but look them up each time, the load balancing provided by looking up from HA-JNDI will give you much the same effect. But of course caching homes can be more efficient than looking them up all the time.

3) Load balancing of the actual bean calls. Here a standard clustered SFSB doesn't really load balance; it sticks to a target server. It does handle failover, but without replication on the server side, failover won't work.

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