Error while running JMX-safe code occurs during running Dynamic Web Project on JBoss AS

java.lang.NullPointerException
at org.jboss.ide.eclipse.as.core.extensions.jmx.JMXUtil.setCredentials(JMXUtil.java:59)
at org.jboss.ide.eclipse.as.core.extensions.jmx.JMXUtil.setCredentials(JMXUtil.java:50)
at org.jboss.ide.eclipse.as.core.extensions.jmx.JMXModel$JMXSafeRunner.run(JMXModel.java:440)
at org.jboss.ide.eclipse.as.core.server.internal.JBossServerBehavior.resumeDeployment(JBossServerBehavior.java:230)
at org.jboss.ide.eclipse.as.core.server.internal.JBossServerBehavior.publishFinish(JBossServerBehavior.java:201)
at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:679)
at org.eclipse.wst.server.core.internal.Server.doPublish(Server.java:887)
at org.eclipse.wst.server.core.internal.Server.publish(Server.java:874)
at org.eclipse.wst.server.core.internal.PublishServerJob.run(PublishServerJob.java:72)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)