JAVA ethz ssh2 Connection连接超时

Question

用JAVA的check.ethz.ssh2包写了个连接Linux的程序，
我是用getSession来执行命令，可是一段时间后再调用getSession就会报错，the connection is being shutdown，
怎样保持Connection一直连接的，或者判断是否还连接着的，判断超时方法，这些有吗？

Answer 1

将root用户重新重命名回root或者代码判断

public String exec(String cmd,String strSplit) {
        InputStream stdout = null;
        StringBuffer sb = new StringBuffer(); 
        Session sess = null;
        try {
    //        System.out.println(this.login());
        //    if (this.login()) {
                if(conn != null && conn.isAuthenticationComplete()){
                    sess = conn.openSession();
                    sess.execCommand(cmd);
                    stdout = new StreamGobbler(sess.getStdout());
                    
                    BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
                    while (true)
                    {
                        String line = br.readLine();
                        if (line == null)
                            break;
                //        System.out.println(line);
                        sb.append(line);
                        if(strSplit!=null&&!"".equals(strSplit))
                            sb.append(strSplit);
                    }
                    sess.waitForCondition(ChannelCondition.EXIT_STATUS, TIME_OUT);
                    logger.warn(conn+"\t"+sess+"\tExitCode: " +sess.getExitStatus());
                }
        //    }
        } catch (Exception e) {
//            e.printStackTrace();
            logger.error(ipAddr+"\t"+cmd);
            logger.error(ExceptionUtil.getExceptionMessage(e));
            System.exit(2);
        } finally{
            if(null != sess){
                sess.close();
                sess = null;
                logger.warn("session关闭");
            }
        }
        return sb.toString();
    }