Hi, I am switching an application from JBoss3.0.5 to JBoss4.2.3 as well JDK1.3 to JDK1.5. I have installed GA version of JBoss4.2.3 and ported this application. On starting the JBoss4.2.3 Application server, I get the following error: 13:17:31,040 DEBUG [NestedThrowable] org.jboss.util.NestedThrowable.parentTraceEnabled=true 13:17:31,040 DEBUG [NestedThrowable] org.jboss.util.NestedThrowable.nestedTraceEnabled=false 13:17:31,040 DEBUG [NestedThrowable] org.jboss.util.NestedThrowable.detectDuplicateNesting=true 13:17:31,040 INFO [ServiceConfigurator] Problem configuring service jboss:type=Service,name=BootstrapEditors org.jboss.deployment.DeploymentException: Exception setting attribute javax.management.Attribute@17f409c on mbean jboss:type=Service,name=BootstrapEditors; - nested throwable: (java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.util.propertyeditor.ObjectNameEditor) at org.jboss.system.ServiceConfigurator.setAttribute(ServiceConfigurator.java:707) at org.jboss.system.ServiceConfigurator.configure(ServiceConfigurator.java:332) at org.jboss.system.ServiceConfigurator.internalInstall(ServiceConfigurator.java:462) 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(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy4.install(Unknown Source) at org.jboss.deployment.SARDeployer.create(SARDeployer.java:251) at org.jboss.deployment.MainDeployer.create(MainDeployer.java:969) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:818) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy5.deploy(Unknown Source) at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482) at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362) at org.jboss.Main.boot(Main.java:200) at org.jboss.Main$1.run(Main.java:508) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.util.propertyeditor.ObjectNameEditor at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:212) at org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521) at org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.jboss.varia.property.PropertyEditorManagerService.registerEditor(PropertyEditorManagerService.java:100) at org.jboss.varia.property.PropertyEditorManagerService.setEditors(PropertyEditorManagerService.java:194) at org.jboss.varia.property.PropertyEditorManagerService.setBootstrapEditors(PropertyEditorManagerService.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.jboss.mx.interceptor.AttributeDispatcher.invoke(AttributeDispatcher.java:136) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.interceptor.ModelMBeanAttributeInterceptor.invoke(ModelMBeanAttributeInterceptor.java:103) at org.jboss.mx.interceptor.PersistenceInterceptor.invoke(PersistenceInterceptor.java:76) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.setAttribute(AbstractMBeanInvoker.java:461) at org.jboss.mx.server.MBeanServerImpl.setAttribute(MBeanServerImpl.java:608) at org.jboss.system.ServiceConfigurator.setAttribute(ServiceConfigurator.java:703) ... 36 more but looking at the similar line when the JBoss3.0.5 runs, its as follows: 04:21:56,755 DEBUG [SARDeployer] Deploying SAR, create step: url file:/D:/Java/jboss-3.0.5/server/grmbs/conf/jboss-service.xml 04:21:56,755 DEBUG [SARDeployer] Registering service UCL=jmx.loading:UCL=3c1b02 04:21:56,755 DEBUG [ServiceCreator] About to create bean: jboss:type=Service,name=BootstrapEditors 04:21:56,755 DEBUG [ServiceCreator] code: org.jboss.varia.property.PropertyEditorManagerService 04:21:56,833 DEBUG [ServiceCreator] Created bean: jboss:type=Service,name=BootstrapEditors 04:21:57,146 DEBUG [ServiceConfigurator] BootstrapEditors set to java.math.BigDecimal=org.jboss.util.propertyeditor.BigDecimalEditor java.lang.Boolean=org.jboss.util.propertyeditor.BooleanEditor java.lang.Class=org.jboss.util.propertyeditor.ClassEditor java.util.Date=org.jboss.util.propertyeditor.DateEditor java.io.File=org.jboss.util.propertyeditor.FileEditor java.net.InetAddress=org.jboss.util.propertyeditor.InetAddressEditor java.lang.Integer=org.jboss.util.propertyeditor.IntegerEditor javax.management.ObjectName=org.jboss.util.propertyeditor.ObjectNameEditor java.util.Properties=org.jboss.util.propertyeditor.PropertiesEditor [Ljava.lang.String;=org.jboss.util.propertyeditor.StringArrayEditor java.net.URL=org.jboss.util.propertyeditor.URLEditor in jboss:type=Service,name=BootstrapEditors 04:21:57,161 DEBUG [ServiceCreator] About to create bean: jboss:type=Service,name=SystemProperties Can you please suggest what could be the issue. Thanks, View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4253465#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...