如何解决；java.net.SocketException:Connection reset；使用tigase.jaxmpp.j2se.jaxmpp 3.0.0时

我已经编写了一个JAXMPPClient.java程序，它使用tigase.jaxmpp.j2se.jaxmpp 3.0.0

我的构建路径中有以下.jar文件

jaxmpp-core-3.0.0
jaxmpp-j2se-3.0.0

以及包含许多.jar文件的文件夹jaxmpp-all-3.0.0。JAXMPPClient.java如下所示

Jaxmpp conn = new Jaxmpp();
conn.getConnectionConfiguration().setConnectionType(
    ConnectionType.socket);
conn.getConnectionConfiguration().setDomain(IP_ADDRESS_OF_XMPP_SERVER);
conn.getConnectionConfiguration().setPort(PORT_NUMBER_OF_XMPP_SERVER);
conn.getConnectionConfiguration().setUserJID(FROM_USERID + "@" +
    IP_ADDRESS_OF_XMPP_SERVER);
conn.getConnectionConfiguration().setUserPassword(FROM_PASSWORD);

String s = tigase.jaxmpp.j2se.connectors.socket.
    SocketConnector.HOSTNAME_VERIFIER_DISABLED_KEY
conn.getSessionObject().setProperty(s, Boolean.TRUE);

try {
    System.out.println("Before login");
    conn.login();
    System.out.println("After login");
} catch (final JaxmppException e) {
    e.printStackTrace();
}

我越来越

Before login
Sep 29, 2015 5:17:12 PM tigase.jaxmpp.j2se.Jaxmpp createConnector
INFO: Using SocketConnector
Sep 29, 2015 5:17:12 PM tigase.jaxmpp.j2se.connectors.socket.SocketConnector start
INFO: Resolving SRV recrd of domain '123.45.678.910'
Sep 29, 2015 5:17:12 PM tigase.jaxmpp.j2se.connectors.socket.SocketConnector start
INFO: Opening connection to /123.45.678.910:5222
Sep 29, 2015 5:17:12 PM tigase.jaxmpp.j2se.connectors.socket.Worker run
WARNING: Exception in worker
java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:209)
    at java.net.SocketInputStream.read(SocketInputStream.java:141)
    at tigase.jaxmpp.j2se.connectors.socket.TextStreamReader.read(TextStreamReader.java:49)
    at tigase.jaxmpp.j2se.connectors.socket.Worker.run(Worker.java:99)

After login

来自JabberID的IP地址、端口号和密码正确无误，在iOS和Android应用程序中运行良好。我还能够成功ping Tigase服务器IP地址

从哪里抛出java.net.SocketException？我如何解决这个问题