On the Linux operating system, after upgrading to Calendar Server 6.3, there are error messages in the http.log file after running start-cal:
cshttpd: General Error: caldb: caldb_pvt_isLocalUrl: hostname of hostname.xyz.com is not resolvable. Please check that hostname is correct and that hostname resolver is correct.
Also, after attempting to log in, the following error message is given:
Backend Host Unresolvable Please try again
Fix: This problem is fixed in Calendar Server 6.3 Update 1, patch number 121658-17.
This is the same as problem number 6516438 in the following section:Reported Problems in Calendar Server 6.3 .