没有消息的套接字超时异常可能是什么情况

Question

当我通过Java语言编写TCP通信时，发生了socketTimeout异常，但打印的异常没有消息：java.net.SocketTimeoutException我使用这个：日志错误(e(;另一个现象是连接时间和读取时间都中断了，变得很长

我尝试关闭后端连接并读取后端超时，这会打印以下异常：java.net.SocketTimeoutException：读取超时/java.net.ConnectException：连接被拒绝：连接...他们会有一些信息

    Socket socket = null;
    String ip = null;
    int port = 0;
    OutputStream out = null;
    InputStream in = null;
    ByteArrayOutputStream baos = null;
    String response = null;
    int connTimeout = 3000;
    int readTimeout = 5000;
    try {
        socket = new Socket();
        ip = locationConfig.getHost();
        port = locationConfig.getPort();
        socket.setSendBufferSize(64 * 1024);
        socket.setReceiveBufferSize(64 * 1024);
        socket.setTcpNoDelay(true);
        socket.setSoTimeout(readTimeout);
        socket.setKeepAlive(true);
        socket.setSoLinger(true, 0);
        socket.setReuseAddress(false);
        socket.connect(new InetSocketAddress(ip, port), connTimeout);
        out = socket.getOutputStream();
        out.write("DETECT1".getBytes());
        out.flush();
        socket.shutdownOutput();
        in = socket.getInputStream();
        int length = 0;
        byte[] buffer = new byte[Constants.READ_BUFFER_MAX_SIZE];
        baos = new ByteArrayOutputStream();
        while ((length = in.read(buffer)) != -1) {
            baos.write(buffer, 0, length);
            baos.flush();
        }
        response = new String(baos.toByteArray());
    } catch (Exception e) {
        log.error(e)
    } finally {
        if (socket != null) {
            try {
                socket.close();
            } catch (IOException e) {
                log.error(e);
            }
        }
    }

我想知道是什么原因造成的

Answer 1

这个问题已经解决了。问题是服务器端内存溢出。当内存已满时，Java 虚拟机可能无法将网络数据移交给上层代码，从而导致上层代码设置的超时失败。和其他奇怪的东西。