Aha, works now: final BeanMetaData bean = bmdb.getBeanMetaData(); | | // Add the attachment | du.addAttachment(BeanMetaData.class, bean); ...yielding: ManagedDeployment: vfszip:/home/alrubinger/business/jboss/wc/jbossas/branches/Branch_5_x/build/output/jboss-5.1.0.GA/server/default/deploy/ejbthree1677.jar/ | +++ ManagedComponent(name=org.jboss.ejb3.metrics.impl.BasicSessionMetrics, type=(ComponentType{type=MCBean, subtype=*}), compName=ejbthree1677.jar-metrics, attachment: org.jboss.ejb3.metrics.impl.BasicSessionMetrics | ++++++ properties: [removeCount, currentSize, maxSize, createCount, availableCount] | S, ALR View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4233725#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...