Unblock the Controller Port

This table lists the typical error message when the Controller port is blocked in your network:

Error Message Solution

ERROR com.singularity.CONFIG.ConfigurationChannel - Fatal transport error: Connection refused WARN com.singularity.CONFIG.ConfigurationChannel - Could not connect to the controller/invalid response from controller, cannot get initialization information, controller host \x.x.x.x\, port 8090, exception Fatal transport error: Connection refused

Try pinging the Controller from the machine where you have configured the application agent.

To check if a port is blocked in the network, use the commands:

  • netstat -an for Windows
  • nmap for Linux.

The default ports are:

  • For on-premises Controller installations: 8090 for HTTP and 8181 for HTTPS.
  • For Controller SaaS service, use the default HTTPS port 443.