scm daemon port allocation

Unfortunately, the port chosen when Eclipse starts the daemon is random. However, it should check if the port is free to use. If you can, it might be good to start the applications that need a port before starting Eclipse. When Eclipse starts, it won't choose the same port. Or you can restart Eclipse in the hopes it will choose a different port.

If this doesn't help, I would suggest opening an enhancement asking for the ability to specify a port or maybe a range of ports that the Eclipse daemon can use.

You can start the daemon using scm instead of lscm. The scm launch has a daemon command where you can start it with a specific port.