无法使用org.eclipse.paho.client.mqttv3连接到Azure IOT MQTT

Question

我正在使用“org.eclipse.paho.client.mqttv3”将我的java代码连接到azure IOT但是已经引发了连接MQTT异常。

脚步：

1）创建MQTT客户端。

2）创建SSL工厂。

3）最后连接到Azure IOT。

但是，连接异常已被提升为：

Inside AzureCommunicator::connect, Could not connect due to an MqttException!

MqttException (0) - java.lang.ClassCastException: class java.net.Socket cannot be cast to class javax.net.ssl.SSLSocket (java.net.Socket and javax.net.ssl.SSLSocket are in module java.base of loader 'bootstrap')
    at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
    at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:736)
    at java.base/java.lang.Thread.run(Thread.java:835)
Caused by: java.lang.ClassCastException: class java.net.Socket cannot be cast to class javax.net.ssl.SSLSocket (java.net.Socket and javax.net.ssl.SSLSocket are in module java.base of loader 'bootstrap')
    at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:141)
    at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:722)
    ... 1 more

代码片段：

        // Connect our client.
        System.out.println("Inside AzureCommunicator::connect, Trying to connect...");
        try
        {
            //client.connect(options);
            client.connect(options).waitForCompletion();
        }
        catch (MqttException e1)
        {
            System.out.println("Inside AzureCommunicator::connect, Could not connect due to an MqttException!\n");
            e1.printStackTrace();
            return false;
        }

Answer 1

调试后我发现，Paho MQTT需要更新才能接受自定义套接字类型。