This appears to be one of those spurious messages in the logs..
As far as I can tell, samba is not configured in any way to consider there is a domain master browser
anywhere present on the network, yet it searches for one and then complains (with default debug level)
about the obvious:
Unable to find the Domain Master Browser name KENNEDY<1b> for the workgroup KENNEDY.
Unable to sync browse lists in this workgroup.
(This isn't the only spurious log message samba produces. Bug 1257 is another one; one suggestion is
to consider a "suppress spurious log messages" option for smb.conf which disables this and that other
marking as later until we revamp Samba logging.
Two years have passed, seems time to reopen.