java.lang.NullPointerException

java.lang.NullPointerException
at org.apache.catalina.connector.MapperListener.registerHost(MapperListener.java:327)
at org.apache.catalina.connector.MapperListener.init(MapperListener.java:123)
at org.apache.catalina.connector.Connector.start(Connector.java:1117)
at org.jboss.web.tomcat.service.deployers.TomcatService.startConnectors(TomcatService.java:623)
at org.jboss.web.tomcat.service.deployers.TomcatService.handleNotification(TomcatService.java:664)
at sun.reflect.GeneratedMethodAccessor222.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.mx.notification.NotificationListenerProxy.invoke(NotificationListenerProxy.java:153)
at $Proxy145.handleNotification(Unknown Source)
at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:257)
at javax.management.NotificationBroadcasterSupport$SendNotifJob.run(NotificationBroadcasterSupport.java:322)
at javax.management.NotificationBroadcasterSupport$1.execute(NotificationBroadcasterSupport.java:307)
at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:229)
at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:484)
at org.jboss.Main.boot(Main.java:221)
at org.jboss.Main$1.run(Main.java:556)
at java.lang.Thread.run(Thread.java:619)