All Oracle Error Codes
Oracle DBA Forum

Frequent Oracle Errors

TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
invalid identifier
PL/SQL compilation error
internal error
missing expression
table or view does not exist
end-of-file on communication channel
TNS:listener unknown in connect descriptor
insufficient privileges
PL/SQL: numeric or value error string
TNS:protocol adapter error
ORACLE not available
target host or object does not exist
invalid number
unable to allocate string bytes of shared memory
resource busy and acquire with NOWAIT specified
error occurred at recursive SQL level string
ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
unable to extend temp segment by string in tablespace
Credential retrieval failed
missing or invalid option
invalid username/password; logon denied
unable to create INITIAL extent for segment
out of process memory when trying to allocate string bytes
shared memory realm does not exist
cannot insert NULL
TNS:unable to connect to destination
remote database not found ora-02019
exception encountered: core dump
inconsistent datatypes
no data found
TNS:operation timed out
PL/SQL: could not find program
existing state of packages has been discarded
maximum number of processes exceeded
error signaled in parallel query server
ORACLE instance terminated. Disconnection forced
TNS:packet writer failure
see ORA-12699
missing right parenthesis
name is already used by an existing object
cannot identify/lock data file
invalid file operation
quoted string not properly terminated

RE: Resolving dblinks

Ruth Gramolini


All databases which you want to access must be in the TNSNAMES.ORA on the
host from which the request orginates. Just put an entry into your
tnsnames.ora for this database.


-----Original Message-----
From: oracle-l-bounce@(protected)
Sent: Tuesday, May 24, 2005 11:08 AM
To: oracle-l@(protected)
Subject: Resolving dblinks

One of our databases was started with TNS_ADMIN set to a directory where
there was no TNSNAMES.ORA file. Now, when a remote user starts an Sqlplus
session and attempts to use a synonym using a dblink, the result is
'ORA-12154: TNS:could not resolve service name'.
When I am logged on the host and start an Sqlplus session and use the same
synonym, the query works.

How is the database link resolved when running on the host as opposed to a
session started from a remote user????

Thank you in advance !!!

Al Rusnak
Oracle Certified Professional
DBA - Computer Operations

* 804-734-8210
* george.rusnak@(protected)