java JBREM000202:远程连接58fb662d到/127.0.0.1:9990时突然关闭

Question

如果我运行此代码：

String host = "127.0.0.1";
    int port = 9990; 
    String urlString = System.getProperty("jmx.service.url","service:jmx:remoting-jmx://" + host + ":" + port);
    System.out.println("\n\n\t****  urlString: " + urlString);;
    JMXServiceURL serviceURL = new JMXServiceURL(urlString);
    Map map = new HashMap();
    String[] credentials = new String[] { "admin1", "1234" };
    map.put("jmx.remote.credentials", credentials);
    map.put("jmx.remote.connection.default.connect.timeout", "150000");
    JMXConnector jmxConnector = JMXConnectorFactory.connect(serviceURL, map);
    MBeanServerConnection connection = jmxConnector.getMBeanServerConnection();
    ObjectName objectName = ObjectName.getInstance("jboss.as:management-root=server");
    String attributeName = "serverState";
    Object result = connection.getAttribute(objectName, attributeName);
    jmxConnector.close();

我得到一个错误：

JBREM000200: Remote connection failed: java.io.IOException: JBREM000202: Abrupt close on Remoting connection 58fb662d to /127.0.0.1:9990

我也不知道如何修复它。我用谷歌搜索了一下，但把端口改成8990之类的东西都没用

我尝试连接到本地JBoss EAP 7.3.3.3:GA