objectinputstream.readobject() 行：不可用 [局部变量不可用]

Question

我编写了一个客户端，它使用ObjectInputStream 在与主线程不同的线程中读取 TCP 消息。我正在使用 Eclipse，虽然控制台中没有抛出异常，但调试窗口会随机打开并在我假设的线程堆栈跟踪中显示以下错误：

Thread[Thread-5](Suspended (exception ThreadDeath))
  objectinputstream.readobject() line: not available [local variables unavailable]
  ReceiveRunnable.run()line:25
  Thread.run()line:not available

这是异常指向的代码：

class ReceiveRunnable implements Runnable {
  Object receivedObject;

  public void run() {
    while (true) {
      try {             
        receivedObject = client.objectInStream.readObject();  //line 25
      } catch (IOException e) {
        // client.reconnectToServer();

        // System.out.println("IO exception in run()");
    // System.out.println(e);
        e.printStackTrace();
  } catch (ClassNotFoundException e) {
    System.out.println("Class Not Found exception in run()");
        System.out.println(e);
    e.printStackTrace();
      } catch (Exception e) {
    System.out.println("Exception in ReceiveRunnable.run()");
        System.out.println(e.toString());
    e.printStackTrace();
      }
    }
  }
}

client.objectInStream 是在 Client 类中创建的：

void connectToServer(){
    try {
        connected = false;

        socket = new Socket(host, port);

        System.out.println("<Connected> " + socket);

        objectInStream = new ObjectInputStream(socket.getInputStream());

        objectOutStream = new ObjectOutputStream(socket.getOutputStream());

        receiveThread = new Thread(new ReceiveRunnable(this, "receive"));

        receiveThread.start();

        /* used to periodically ping the server*/
        long delay = 0;
        long period = 5000;

        connTimer.schedule(clientCheckConnTimerTask, delay, period);

        connected = true;

        sendString("[conn]" + clientUUID);
    } catch (IOException e) {
        msgBox.set2LineOkMessage("Can not connect to server.", "");
        msgBox.show();
    }
}

谁能告诉我是什么导致了这个问题以及如何解决？

Answer 1

如果try 后面没有跟随关闭套接字并跳出循环的catch (EOFException exc)，则您的代码不正确。

对于同一个套接字，您应该始终在ObjectInputStream 之前创建ObjectOutputStream，而不是之后，否则会出现死锁。