MACROMEDIA COLDFUSION MX-CLUSTERCATS Use Manual page 138

Error
Host name not found in
any reverse mapping
Probable forward
mapping
misconfiguration for
<hostname>
Probable round robin
configuration for
<hostname>
128 Chapter 6 ClusterCATS Utilities
Description
For each IP address found on the system, an attempt was made
to find the corresponding host name. None of the IP addresses
on the system reverse mapped to the system's main fully qualified
host name. The problem is either:
The host name maps to the wrong IP address.
The IP address that the host name maps to does not have an
entry in the DNS table for the reverse map. Consequently,
nslookup does not return the hostname.
The host name does not map to one IP address. Use the
hostinfo tool to determine to which IP address it maps. For
more information, see "Using hostinfo" on page 129.