Following the upgrade of IGB to use Java 21, there are additional steps to run IGB through Netbeans with a debugger:
Start IGB through a terminal on Mac/Linux
sh run_igb.sh -d
Start IGB through a terminal on Windows
sh run_igb.bat -d
In Netbeans, attach a debugger by going to Debug > Attach Debugger…
In the window that opens, enter the following values:
Debugger: Java Debugger (JPDA)
Connector: SocketAttach (Attaches by socket to other VMs)
Transport: dt_socket
Host: localhost
Port: 5005
Then click OK