Mqtt消息未从C发布到Siddhi

我正在尝试将mqtt消息发布到Siddhi流处理器。我可以从我的C程序发送消息，rc为0。没有连接问题，但消息未发布到Siddhi

我发布mqtt消息的C代码是：

#define ADDRESS     "tcp://test.mosquitto.org:1883"
#define CLIENTID    "mqttClient"
#define TOPIC       "mqttTopic"
#define PAYLOAD     "Hello World!"
#define QOS         0
#define TIMEOUT     30000L

int main(int argc, char* argv[])
{
MQTTClient client;
MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
MQTTClient_message pubmsg = MQTTClient_message_initializer;
MQTTClient_deliveryToken token;
int rc;
int success;

MQTTClient_create(&client, ADDRESS, CLIENTID,MQTTCLIENT_PERSISTENCE_NONE, NULL);
conn_opts.keepAliveInterval = 60;
conn_opts.cleansession = 1;

rc = MQTTClient_connect(client, &conn_opts);

if (rc!= MQTTCLIENT_SUCCESS)
{
    printf("Failed to connect, return code %d\n", rc);
    exit(EXIT_FAILURE);
}
if(rc == 0){
    pubmsg.payload = PAYLOAD;
    pubmsg.payloadlen = strlen("hello");
    pubmsg.qos = QOS;
    pubmsg.retained = 0;
    success=MQTTClient_publish(client,TOPIC,pubmsg.payloadlen,"hello",pubmsg.qos,pubmsg.retained,NULL);  
    printf("%d\n", success); 
}
//MQTTClient_publishMessage(client, TOPIC, &pubmsg, &token);
rc = MQTTClient_waitForCompletion(client, token, TIMEOUT);
if(rc==0){
    printf("Message with delivery token %d delivered\n", token);
}else{
    printf("Message not delivered");
}
MQTTClient_disconnect(client, 10000);
MQTTClient_destroy(&client);
return rc;
}

---

我不明白我犯了什么错误。任何建议都会对我很有帮助。

当您连接到代理时，代理只会在您订阅的主题的新数据到达时向您发出通知，因此如果没有任何更新，代理将不会向您发送任何信息。@splaten您的意思是每次都尝试发送不同的数据吗。我试过了。事实上，数据正在发送，但没有在siddhino发布。我没有，MQTT它有两个部分，一个包含主题和订阅者的代理。您是订阅者，当代理接收到主题的更新时，该主题的任何订阅者都会收到新数据的通知。