Question

我在Java中有一个SSLServerSocket，当客户端连接时，我为它的通信创建一个线程：

    System.setProperty("javax.net.ssl.keyStore", "keystore");
    System.setProperty("javax.net.ssl.keyStorePassword", "password");

    SSLServerSocket server = (SSLServerSocket)null;

    if(ipSocket == null){
        ipSocket = new HashMap<String,java.net.Socket>();
    }

    try {

        SSLServerSocketFactory sslserversocketfactory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
        server = (SSLServerSocket) sslserversocketfactory.createServerSocket(4380);
        log.info("Server started");

    } catch(IOException e) {
        e.printStackTrace();
    }

    while(true){

        try {
            SSLSocket client = (SSLSocket) server.accept();
            log.info("new client");

        } catch (Exception e){
            e.printStackTrace();
        }
    }

问题在于代码有时会拒绝连接。当代码运行一段时间时会发生这种情况，所以我认为问题是客户端丢失连接并重新进行协商，但前一个线程仍处于活动状态，并且存在最大化的SSLServerSockets。

这会发生吗？最大数字是多少？

如何在断开连接时终止线程？

Answer 1

根据您的代码和我对网络的理解（来自较低级别和API级别），您可能会错误地使用API。

在较高的层面上，你想要做的有点不同

public static void main(String[] args) {
    System.setProperty("javax.net.ssl.keyStore", "keystore");
    System.setProperty("javax.net.ssl.keyStorePassword", "password");
    SSLServerSocket server = (SSLServerSocket)null;
    if(ipSocket == null){
        ipSocket = new HashMap<String,java.net.Socket>();
    }

    try {
        SSLServerSocketFactory sslserversocketfactory = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
        // Creates a socket with a default backlog of 50 - meaning
        // There will be a maximum of 50 client connection attempts on this 
        // socket after-which connections will be refused. If the server is
        // overwhelmed by more than that number of requests before they can be
        // accepted, they will be refused
        // The API allows for you to speccify a backlog.
        server = (SSLServerSocket) sslserversocketfactory.createServerSocket(4380);
        log.info("Server started");
    } catch(IOException e) {
        e.printStackTrace();
    }

    while(true){
        try {
            // This will take one of the waiting connections
            SSLSocket client = (SSLSocket) server.accept();
            log.info("new client");
            // HERE is where you should create a thread to execute the
            // conversation with the client.
        } catch (Exception e){
            e.printStackTrace();
        }
    }
}

我希望更正确地回答你的问题。

关于EJP的评论 - 我更新了我的解释并引用了位于here的文档：

传入连接指示的最大队列长度（连接请求）设置为backlog参数。如果队列已满时连接指示到达，则拒绝连接。

SSLServerSocket在线程中接受SSLSocket客户端，是否有最大值？

1 个答案: