Jetty在OSGI中的使用

Question

使用jetty作为web容器在osgi中使用，但是启动的时候报
EXCEPTION  java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
at sun.net.www.http.HttpClient.New(HttpClient.java:306)
at sun.net.www.http.HttpClient.New(HttpClient.java:323)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1172)
代码如下
try{
Server server = new Server(); 
Connector connector = new SelectChannelConnector(); 
connector.setPort(8081); 
server.setConnectors(new Connector[]{connector}); 
Constraint constraint = new Constraint(); 
constraint.setName(Constraint.__BASIC_AUTH);; 
constraint.setRoles(new String[]{"user","admin","moderator"}); 
constraint.setAuthenticate(true); 
ConstraintMapping cm = new ConstraintMapping(); 
cm.setConstraint(constraint); 
cm.setPathSpec("/*"); 
SecurityHandler sh = new SecurityHandler(); 
sh.setUserRealm(new HashUserRealm("MyRealm","/etc/realm.properties")); 
sh.setConstraintMappings(new ConstraintMapping[]{cm}); 
WebAppContext webappcontext = new WebAppContext(); 
webappcontext.setContextPath("/com.jetty"); 
webappcontext.setWar("com.jetty.war");
webappcontext.addHandler(sh); 
HandlerCollection handlers= new HandlerCollection(); 
handlers.setHandlers(new Handler[]{webappcontext, new DefaultHandler()}); 
server.setHandler(handlers); 
server.start(); //启动报错
server.join(); 
}catch(Exception e){
e.printStackTrace();
}