Hi, I'm trying to limit the number of concurrent invocations on an EJB. I've done (I believe) the required config to do this (as described in ). However when I start a client that calls a lengthy (30+ secs) operation on the EJB then start a new client that calls another, quicker operation (2-3 secs), the second returns before the first has finished. Am I missing something? I'm using jboss-4.2.1 jboss.xml, located in META-INF: <?xml version="1.0" encoding="UTF-8"?> | <jboss> | <enterprise-beans> | <session> | <ejb-name>TMTFetchDataServiceBean</ejb-name> | <clustered>${com.serco.tcis.clustered:true}</clustered> | <aop-domain-name>TMT Fetch Data Service</aop-domain-name> | </session> | </enterprise-beans> | </jboss> tmt-fetch-aop.xml located in the root of my jar <aop> | <domain name="TMT Fetch Data Service" extends="Stateless Bean" inheritBindings="true"> | <annotation expr=&quot;!class(@org.jboss.annotation.ejb.PoolClass)&quot;&gt;(a)org.jboss.annotation.ejb.PoolClass (value=org.jboss.ejb3.StrictMaxPool.class, maxSize=1, timeout=9999999) | </annotation> | </domain> | </aop> My EJB @Stateless | @RemoteBinding( jndiBinding = "TransportFusion/TMTFetchDataService" ) | public class TMTFetchDataServiceBean implements TMTFetchDataServiceRemote { | // ... | } Thanks, Vic View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4155830#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...