jboss启动发生以下异常是为什么呢?

08:56:45,015 INFO  [Server] Starting JBoss (MX MicroKernel)...
08:56:45,015 INFO  [Server] Release ID: JBoss [Zion] 4.0.2 (build: CVSTag=JBoss_4_0_2 date=200505022023)
08:56:45,015 INFO  [Server] Home Dir: E:\jboss-4.0.2
08:56:45,015 INFO  [Server] Home URL: file:/E:/jboss-4.0.2/
08:56:45,015 INFO  [Server] Library URL: file:/E:/jboss-4.0.2/lib/
08:56:45,015 INFO  [Server] Patch URL: null
08:56:45,015 INFO  [Server] Server Name: default
08:56:45,015 INFO  [Server] Server Home Dir: E:\jboss-4.0.2\server\default
08:56:45,015 INFO  [Server] Server Home URL: file:/E:/jboss-4.0.2/server/default/
08:56:45,015 INFO  [Server] Server Data Dir: E:\jboss-4.0.2\server\default\data
08:56:45,015 INFO  [Server] Server Temp Dir: E:\jboss-4.0.2\server\default\tmp
08:56:45,015 INFO  [Server] Server Config URL: file:/E:/jboss-4.0.2/server/default/conf/
08:56:45,015 INFO  [Server] Server Library URL: file:/E:/jboss-4.0.2/server/default/lib/
08:56:45,015 INFO  [Server] Root Deployment Filename: jboss-service.xml
08:56:45,015 INFO  [Server] Starting General Purpose Architecture (GPA)...
08:56:45,312 INFO  [ServerInfo] Java version: 1.6.0_01,Sun Microsystems Inc.
08:56:45,312 INFO  [ServerInfo] Java VM: Java HotSpot(TM) Client VM 1.6.0_01-b06,Sun Microsystems Inc.
08:56:45,312 INFO  [ServerInfo] OS-System: Windows XP 5.1,x86
08:56:45,750 INFO  [Server] Core system initialized
08:56:47,093 INFO  [Log4jService$URLWatchTimerTask] Configuring from URL: resource:log4j.xml
08:56:47,171 INFO  [WebService] Using RMI server codebase: http://USER-CE6B996370:8083/
08:56:47,312 ERROR [NamingService] Starting failed jboss:service=Naming
java.rmi.server.ExportException: Port already in use: 1098; nested exception is: 
java.net.BindException: Address already in use: JVM_Bind
at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:310)
at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:218)
at sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:393)
at sun.rmi.transport.LiveRef.exportObject(LiveRef.java:129)
at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:190)
at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:293)
at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:256)
at org.jnp.server.Main.initJnpInvoker(Main.java:299)
at org.jnp.server.Main.start(Main.java:262)
at org.jboss.naming.NamingService.startService(NamingService.java:221)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:272)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:222)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:121)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
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