FL_HUB clients connection issue.

[azad-nstu]

I was trying to run the existing fl_hub example in NVFlare 2.4.1, but most of the time the clients had difficulties connecting to the server, as shown below:

After troubleshooting, I realized that the issue could be related to the ports already in use by other processes that were configured for fl_hub. To resolve this, before running the application, I killed the processes occupying the ports 8002, 8003, 8102, 8103, 8202, and 8203 by running the following command:

for port in 8002 8003 8102 8103 8202 8203; do sudo lsof -i :$port -t | xargs sudo kill -9; done

After executing this command, the issue was resolved for me, and all the clients were able to connect successfully. You may want to check this out.
Thanks!