java - Error while invoking mbean in JBoss AS7 -

i trying invoke mbean jboss application using below code:

    mbeanserver mbeanserver =  managementfactory.getplatformmbeanserver();                         objectname namingname = objectname.getinstance("naming"+namingport+":type=rmiregistry");         if (mbeanserver.isregistered( namingname))                mbeanserver.unregistermbean( namingname);              mbeanserver.creatembean( "mx4j.tools.naming.namingservice", namingname, null, new object[] { new integer(                namingport) }, new string[] { "int" });             mbeanserver.invoke( namingname, "start", null, null);             //namingport = ((integer)mbeanserver.getattribute(namingname, "port")).intvalue();             string jndipath = "/jmxconnector";             int port = 9999;  // management-native port              string urlstring = system.getproperty("jmx.service.url","service:jmx:remoting-jmx://127.0.0.1:" + port);             jmxserviceurl serviceurl = new jmxserviceurl(urlstring);              //jmxserviceurl url = new jmxserviceurl("service:jmx:rmi://localhost/jndi/rmi://localhost:2099" + jndipath);             jmxserviceurl url = new jmxserviceurl(urlstring);              // create , start rmiconnectorserver             jmxconnectorserver connectorserver = jmxconnectorserverfactory.newjmxconnectorserver( url, null,                mbeanserver);             connectorserver.start(); 

while executing code, getting below error in jboss console:

caused by: java.lang.linkageerror: loader constraint violation: loader (instance of org/jboss/modules/moduleclassloader) initiated loading diff erent type name "javax/management/mbeanserver"         @ com.sample.app.mx4j.mx4jstandalonemanagement.preparembeanserver(mx4jstandalonemanagement.java:116) [sample-app.jar:]          @ com.sample.app.basemanagement.getmbeanserver(unknown source) [sample-app.jar:]         @ com.sample.app.basemanagement.unregistermbean(unknown source) [sample-app.jar:]         @ com.sample.app.managedconnectionfactory.registermbean(unknown source) [sample-app.jar:]         @ com.sample.app.managedconnectionfactory.<init>(unknown source) [sample-app.jar:]         @ com.sample.app.xamanagedconnectionfactory.<init>(unknown source) [sample-app.jar:]         @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method) [rt.jar:1.7.0_80]         @ sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:57) [rt.jar:1.7.0_80]         @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45) [rt.jar:1.7.0_80]         @ java.lang.reflect.constructor.newinstance(constructor.java:526) [rt.jar:1.7.0_80]         @ java.lang.class.newinstance(class.java:383) [rt.jar:1.7.0_80]         @ org.jboss.as.connector.services.resourceadapters.deployment.abstractresourceadapterdeploymentservice$abstractas7radeployer.initandinject(abstractreso urceadapterdeploymentservice.java:495)         ... 9 more 

what reason of error?