ActiveMQ setup - Unable to send the message to Queue (error - java.io.IOException: Unknown data type: 47)
The 'Unknown data type: 47' error is due to the configuration you are using for the following broker URL:
<value>tcp://localhost:8161</value>The problem is that the port number is incorrect. Port 8161 is where the embedded ActiveMQ web server runs, and therefore where you can access the web console. This explains the error message and stack trace that you're seeing. Whenever you visit the web console for the broker at this address (*:8161) the exception is thrown.
To fix the problem, change the port number to the port on which the ActiveMQ TCP transport is listening. I hazard a guess that it is probably the default port number of 61616.