socket 多线程 (3000条以上时出现java.net.ConnectException: Connection timed out: connect

当发送3000条以上时出现java.net.ConnectException: Connection timed out: connect
不是总出现~
捕获了一下。.是  socketConnection = new Socket(192.168.1.123, 11112);
这里new soket出现的异常   public void run() {
//       
//         Socket socketConnection = null;
//         ObjectOutputStream clientOutputStream = null;
//         try {
//             socketConnection = new Socket(192.168.1.123, 11112);
//
//             clientOutputStream = new ObjectOutputStream(socketConnection.
//                     getOutputStream());           
//             clientOutputStream.writeObject(ptc);
             
               clientOutputStream.close();
               socketConnection.close(); 
           } catch (Exception e) {
              
                 logger.info("协议4错误" + e.toString());
                 clientOutputStream.close();
                 socketConnection.close(); 
           }