Possible race condition in onSucess in IMqttActionListener for connection status

I would like to send a message when the client connects to the broker. I added an IMqttActionListener to the connect parameters. About half the time. it works, the other half there is an exception thrown in the onSuccess function when it tries to send the message. Here is the output when it fails:

> MQTT connected to tcp://broker.hivemq.com:1883
> 4
> reason 32104
> msg Client is not connected

```
public void onSuccess(IMqttToken arg0) {
System.out.println("MQTT connected to " + arg0.getClient().getServerURI());
byte[] payload = (this.connectPayload + MqttConnectionListener.getIso8601String()).getBytes();
try {
arg0.getClient().publish(this.connectTopic, payload, this.qos, this.connectRetained);
} catch (MqttPersistenceException e) {
System.out.println("3");
Demo.printMqttException(e);
} catch (MqttException e) {
System.out.println("4");
Demo.printMqttException(e);
}
}
```