[ https://issues.jboss.org/browse/WFLY-8458?page=com.atlassian.jira.plugin.... ] Chao Wang commented on WFLY-8458: --------------------------------- At [ParsedServiceDeploymentProcessor.java|https://github.com/wildfly/wildfly/...], we can add NPE check as: {code:ParsedServiceDeploymentProcessor.java} final Constructor<?> constructor = mBeanClassHierarchy.get(0).getConstructor(types); + if(constructor == null){ + throw EeLogger.ROOT_LOGGER.defaultConstructorNotFound(mBeanClassHierarchy.get(0).getIndexedClass()); + } final Object mBeanInstance = ReflectionUtils.newInstance(constructor, params); {code} to throw DeploymentUnitProcessingException instead of NPE. When I undeployed the reproducer, I also noticed another NPE as: {code:xml} 15:47:55,317 WARN [org.jboss.msc.inject] (ServerService Thread Pool -- 62) MSC000100: Unexpected failure to uninject public void org.jboss.as.quickstarts.mbeanhelloworld.mbean.PropertyManagerDynamicBean.setPropertyFile(java.lang.String) throws java.io.IOException: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.jboss.msc.inject.MethodInjector.uninject(MethodInjector.java:119) at org.jboss.msc.service.ServiceControllerImpl$StopContextImpl.complete(ServiceControllerImpl.java:2623) at org.jboss.as.service.CreateDestroyService$2.run(CreateDestroyService.java:104) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) at org.jboss.threads.JBossThread.run(JBossThread.java:320) Caused by: java.lang.NullPointerException at java.io.File.<init>(File.java:360) at org.jboss.as.quickstarts.mbeanhelloworld.mbean.PropertyManagerDynamicBean.getPropFile(PropertyManagerDynamicBean.java:151) at org.jboss.as.quickstarts.mbeanhelloworld.mbean.PropertyManagerDynamicBean.load(PropertyManagerDynamicBean.java:155) at org.jboss.as.quickstarts.mbeanhelloworld.mbean.PropertyManagerDynamicBean.setPropertyFile(PropertyManagerDynamicBean.java:176) ... 13 more {code} The 2nd one above is explained at https://issues.jboss.org/browse/WFLY-670?focusedCommentId=13028625&pa... -- This message was sent by Atlassian JIRA (v7.2.3#72005)