@PVuchetich2 said in KEA DHCP continuously rebooting with error message after 24.11 upgrade and switch from ISC:

COMMAND_SOCKET_ACCEPT_FAIL Failed to accept incoming connection on command socket -1: Bad file descriptor

Here : https://kea.readthedocs.io/en/kea-2.1.7/kea-messages.html

A socket is just some kind of special file. Its created at kea starts, no big deal. Every process, like ngins, (web GUI) unbound (resolver) create these.

COMMAND_SOCKET_ACCEPT_FAIL

Failed to accept incoming connection on command socket %1: %2

This error indicates that the server detected incoming connection and executed accept system call on said socket, but this call returned an error. Additional information may be provided by the system as second parameter.

Try this :
In the GUI, stop all kea server services.
Then use the console or (better) SSH, menu option 8.

cd /var/run

then

ls -al kea*

Normally, there should be no files anymore that starts with "kea".
If there are, remove them all.

Now, start the kea server(s) again.
Check again the content of the directory, there should be a new kea-ctrl-socket file again (and a lock file).

Other checks :
Systems processes like unbound, the web GUI and kea gets restarted when there is an up down interface. This happens when an interfaces goes down for a moment. You don't have these ?