Same here. Upgraded from 2.7.4 to 2.32.2 and the Windows slave, using TCP JNLP agent on a fixed port failed to connect on manually startup. Agent seems to fail on
SEVERE: http://10.0.2.17:8080/tcpSlaveAgentListener/ is invalid: 404 null
When I switch to random port and restarted the agent manually, it worked.
To cause it to fail again I switched to fixed port. Port is not blocked and not not being used by another app.Changing the fixed port number does not help. Jenkins master is running on Tomcat.
When the below is executed fixed port:
when server returns a 404.
When the same curl is executed with a variable port it succeeds.
I am required to use a fixed port and any recommendations would be apprciated.