MqttClient connect fails with ConnectionFailedException: protocol TLSv1.2 not supported on Android 4.4.2

[rohit5ram]

Expected behavior

Mqtt5Client should connect with specified protocol version

Actual behavior

com.hivemq.client.mqtt.exceptions.ConnectionFailedException: java.lang.IllegalArgumentException: Protocol TLSv1.2 is not supported.

To Reproduce

Steps

mqttClientBuilder.sslConfig()
.protocols(Collections.singletonList(TlsVersion.TLS_1_2.javaName()))
.applySslConfig()
.buildAsync();

Reproducer code

Mqtt5ClientBuilder mqttClientBuilder = MqttClient.builder()
.useMqttVersion5()
.identifier(deviceId)
.serverHost(appContext.getString(R.string.mqtt_wss_broker))
.serverPort(443)
.webSocketConfig(MqttWebSocketConfig.builder().serverPath("mqtt").build())
.automaticReconnectWithDefaultConfig()
.addConnectedListener(context -> {
setMqttClientConnected(true);
Log.i(Util.TAG, LOG_LABEL + " Mqtt client connected");
publishOnline(appContext);
})
.addDisconnectedListener(context -> {
setMqttClientConnected(false);
Log.e(Util.TAG, LOG_LABEL + " Mqtt client disconnected");
LogUtils.logException(new Exception(context.getCause()), LOG_LABEL);
});
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
mqttClientBuilder = mqttClientBuilder.sslWithDefaultConfig();
} else {
mqttClientBuilder = mqttClientBuilder.sslConfig()
.protocols(Collections.singletonList(TlsVersion.TLS_1_2.javaName()))
.applySslConfig();
}
mqttClient = mqttClientBuilder.buildAsync();

Details

• Affected HiveMQ MQTT Client version(s): 1.2.0
• Used JVM version: Java 1.8
• Used OS (name and version): Android 4.4.2
• Used MQTT version: mqtt5
• Used MQTT broker (name and version): vernemq

[rohit5ram]

@SgtSilvio Can you please help us fix this? We are blocked to deploy MQTT support on Android 4.4.2 and lower
We have found a working solution to enable TLSv1.2 by using Google ProviderInstaller
We cannot guarantee to have GooglePlayServices installed on every device. So we cannot rely on it.

We have found another solution to enable TLSv1.2 on OkHttpClient but that wouldn't help us enabling the same on hivemqclient

[SgtSilvio]

Please ask this question on the HiveMQ Community Forum (https://community.hivemq.com/) as this is not directly related with the HiveMQ MQTT client and you might find help from other people there.

[SgtSilvio]

As there was no activity anymore, I will close this issue.
Don't hesitate to comment or open a new issue.