Concurrency Control in session beans

Hi I have an application deployed in a cluster with ejb app. deployed in all managed server. I was trying to get concurrency control implemented in session bean but was not able to do it. need help thanks in advance
[236 byte] By [javaserverpagea] at [2007-10-2 10:19:46]
# 1
EJBs are single-threaded objects, by definition. The container handles all that stuff. You just have to write your objects so they're thread-safe.%
duffymoa at 2007-7-13 1:48:57 > top of Java-index,Enterprise & Remote Computing,Enterprise Technologies...
# 2
got what you are sayingBut my problem is to have the concurrency control across the servers.what you are saying is correct in a single JVM not in multiple JVM's
javaserverpagea at 2007-7-13 1:48:57 > top of Java-index,Enterprise & Remote Computing,Enterprise Technologies...