Hi,
I am new to AWS and trying the Communication between Greengrass Core and Ignition MQTT Transmission Module, followed all the instructions as per the below article but still not able to establish communication link between AWS Greengrass Core and Ignition Transmission Module.
Below are the error messages in Ignition Gateway:
MyIgnition2: connect failed due to Unable to connect to server
rg.eclipse.paho.client.mqttv3.MqttException: Unable to connect to server
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:90)
at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:92)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:676)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.base/java.net.SocksSocketImpl.connect(Unknown Source)
at java.base/java.net.Socket.connect(Unknown Source)
at java.base/sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at org.eclipse.paho.client.mqttv3.internal.TCPNetworkModule.start(TCPNetworkModule.java:81)
… 3 common frames omitted
Can anyone suggest where I should look for logs in AWS Greengrass and what could be the problem?
Regards,
SSG