Jboss AS 4.2.1/ JBM 1.3GA I am attempting to set the 'MaxSize' of a Queue... such that all messages that come after the maxSize is reached are dropped. Using the jmx-console to change this value from -1 to 1000 causes this error : | .0.0.1-8088-1]: org.jboss.jms.server.destination.QueueService - Cannot change the value of associated server's ObjectName after initialization! | 10:24:12,693 ERROR [http-127.0.0.1-8088-1]: STDERR - [Fatal Error] :2:24: XML document structures must start and end within the same entity. | 10:24:12,695 ERROR [http-127.0.0.1-8088-1]: org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/jmx-console].[HtmlAdaptor] - Servlet.service() for servlet HtmlAdaptor threw exception | org.jboss.util.NestedRuntimeException: XML document structures must start and end within the same entity.; - nested throwable: (org.xml.sax.SAXParseException: XML document structures must start and end within the same entity.) | at org.jboss.util.propertyeditor.DocumentEditor.getAsDocument(DocumentEditor.java:88) | at org.jboss.util.propertyeditor.ElementEditor.setAsText(ElementEditor.java:41) | at org.jboss.util.propertyeditor.PropertyEditors.convertValue(PropertyEditors.java:260) | at org.jboss.jmx.adaptor.control.Server.setAttributes(Server.java:190) | at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.updateAttributes(HtmlA | If i attempt to set this value via the 'attribute' in the destinations xml file ...i get the error : 71 INFO [Log4jService$URLWatchTimerTask] Configuring from URL: resource:jboss-log4j.xml | 10:26:19,877 INFO [main]: org.jboss.ejb3.EJB3Deployer - Starting java:comp multiplexer | 10:26:20,274 INFO [main]: org.jboss.system.ServiceConfigurator - Problem configuring service jboss.messaging.destination:service=Queue,name=UniversalResourceProcessingQueue | org.jboss.deployment.DeploymentException: Exception setting attribute MaxSize = 10000 on mbean jboss.messaging.destination:service=Queue,name=UniversalResourceProcessingQueue; - nested throwable: (java.lang.NullPointerException) | at org.jboss.system.ServiceConfigurator.setAttribute(ServiceConfigurator.java:698) | at org.jboss.system.ServiceConfigurator.configure(ServiceConfigurator.java:332) | at org.jboss.system.ServiceConfigurator.internalInstall(ServiceConfigurator.java:460) | at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:171) | at org.jboss.system.ServiceController.install(ServiceController.java:226) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce My Queue config is as follows : <mbean code="org.jboss.jms.server.destination.QueueService" | name="jboss.messaging.destination:service=Queue,name=UniversalResourceProcessingQueue" | xmbean-dd="xmdesc/Queue-xmbean.xml"> | <depends optional-attribute-name="ServerPeer">jboss.messaging:service=ServerPeer</depends> | <depends>jboss.messaging:service=PostOffice</depends> | <attribute name="MaxSize">10000</attribute> | <attribute name="SecurityConfig"> | <security> | <role name="guest" read="true" write="true"/> | </security> | </attribute> | </mbean> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4095718#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...