TNS alias resolution weirdness
I've specified a NAMES.DEFAULT_DOMAIN parameter in the sqlnet.ora and for instances on that particular server, it does not appear to be appended to the unqualified TNS alias. See thread below:
H:\>tnsping example
TNS Ping Utility for 32-bit Windows: Version 9.0.1.1.1 - Production on 03-FEB-2009 08:22:12
Copyright (c) 1997 Oracle Corporation. All rights reserved.
Used parameter files:
M:\oracle\ora90\network\admin\sqlnet.ora
Used LDAP adapter to resolve the alias
Attempting to contact (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))(CONNECT_DATA=))