What port does the Mule Debugger listen on for incoming TCP connections to localhost by default?

What port does the Mule Debugger listen on for incoming TCP connections to localhost by default?

• A. 666
• B. 8080
• C. 6666
• D. 7777

Answer: (C)

The debugging connection for Mule runs over a local TCP listener, so the debugger client in your IDE can attach to the running Mule runtime on your own machine. By default, this listener binds to port 6666 on localhost, meaning the debugger connects to localhost:6666 to establish the session. This setup lets you pause, inspect, and control the flow of your Mule application directly from the IDE. You can change the port if needed, but unless you override it, 6666 is the standard default. Other common ports like 8080 (web traffic) or 7777 are used for different services, not the Mule Debugger’s default listening port.

The debugging connection for Mule runs over a local TCP listener, so the debugger client in your IDE can attach to the running Mule runtime on your own machine. By default, this listener binds to port 6666 on localhost, meaning the debugger connects to localhost:6666 to establish the session. This setup lets you pause, inspect, and control the flow of your Mule application directly from the IDE. You can change the port if needed, but unless you override it, 6666 is the standard default. Other common ports like 8080 (web traffic) or 7777 are used for different services, not the Mule Debugger’s default listening port.