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: ORA-12547 : TNS lost contact

Onkar N Tiwary


I checked for the alert.log also but no error reported there. the problem is errupting when a user is trying to connect to server from the client pc but on the server i am able to connect but that too without using connect string. I was wondering it might be a problem because of the patch as I had told earlier also that before we had been using without any such error but when we applied a patch on this and upgraded to then we started getting the error. Now after wasting a lot time on this issue, we were in a position to resolve this problem but then we had been another error
ORA-12500 : TNS listener unable to start dedicated server process
now we are planning for the re-installation of oracle using the method :
1. full database export
2. created script to create same tablespace with same users and same password
3. importing the dmp file
Is this method ok?????
On 11/9/05, Ruth Gramolini <rgramolini@tax.state.vt.us> wrote:
Did you check the alert log?  Just a thought.  Here is the details on this error:
12547, 00000, "TNS:lost contact"
// *Cause: Partner has unexpectedly gone away, usually during process
// startup.
// *Action: Investigate partner application for abnormal termination. On an
// Interchange, this can happen if the machine is overloaded.        
-----Original Message-----
From: oracle-l-bounce@freelists.org [mailto:oracle-l-bounce@freelists.org]On Behalf Of Onkar N Tiwary
Sent: Wednesday, November 09, 2005 7:21 AM
To: oracle-l@freelists.org
Subject: ORA-12547 : TNS lost contact

Hi guys,
Since today morning I am facing one problem :
ORA-12547 : TNS lost contact
when i re-started my server, i worked for couple of seconds and then again i was getting the same error. I searched on metalink which says its a bug which has been fixed in and 10g and my db is however we had patched our database yesterday and since then we are getting this error. i reconfigured the listener on different port also but then too same error.
Db is  :
os : win 2k adv. server
any help???????????????

Thanks & Regards,
T. Onkar Nath
OneAPPS Enterprise Technology Pvt. Ltd.

Thanks & Regards,
T. Onkar Nath
OneAPPS Enterprise Technology Pvt. Ltd.