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| IIB 10 no monitoring events with bind_address is hostname |
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Message
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| john.ormerod |
 Posted: Mon May 14, 2018 7:15 am Post subject: IIB 10 no monitoring events with bind_address is hostname |
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Apprentice
Joined: 14 Feb 2017
Posts: 49
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Hello
Windows 10 / IIB 10.0.0.11 / Eclipse paho 3-1.1.0
I have a java app that subscribes to IIB's monitoring events. It works when using JMS/MQ. I have extended it to use MQTT as an alternative.
My app receives monitoring events via MQTT when connected as 'localhost'. However, when I change bind_addresss to be the hostname, my app connects, issues subscription to topics, but never gets any monitoring events. I don't know how to determine whether the problem is with the sub or pub.
I discovered the hostname issue, when I first tried to subscribe to a remote IIB system. In order to get connected, I had to change bind_address on the remote IIB, to be the machine's hostname. After various trials and errors, I found that the problem occurs when the bind_address value is not 'localhost'.
My connection properties (from my startup config) are:
<ClientId>njams#</ClientId>
<Host>JOT420</Host>
<Port>11883</Port>
<KeepAliveInterval>30</KeepAliveInterval> <!-- seconds -->
<QoS>0</QoS>
The ClientId is appended with the topic string to ensure it is unique.
My connection code is
| Code: |
protected MqttClient connectToBroker(String serverUrl, String clientId, MqttConnectOptions connOpts, String topic) {
// Connect to Broker
MqttClient mqttClient = null;
try {
mqttClient = new MqttClient(serverUrl, clientId);
mqttClient.setCallback(new MqttEventsConsumer(mqttClient, connOpts, request, topic));
IMqttToken token = mqttClient.connectWithResult(connOpts);
if (token.getException() != null) {
logger.error("Response is: exception = {}.", token.getException().toString()) ;
}
logger.debug("Response from Broker connection: {}.",token.getResponse().toString());
return mqttClient;
} catch (MqttException e) {
logger.error(e.toString(), e);
}catch (Exception e) {
logger.error(e.toString(), e);
}
return mqttClient; // "Failed to connect to " + serverUrl;
}
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I hope someone can help me with this. I the answer is out there somewhere, I haven't found the right search terms.
Regards, John |
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