Synergy Linux Java client failed to start

Symptoms:

Both CLI and Classic client start fine, but the Java client start fails. It displays the login dialog, then briefly displays splash screen, then fails with no message.

The only trace is the ‘Permission denied’ in the ccm_eng.log.

Background:

The client IP has changed since the last good start.

Solution:

Make sure the server's /etc/hosts lists the correct machine name and IP for the client machine.

End of story.