All Oracle Error Codes
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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

RAC Failover testing

Anurag Verma




I am doing Testing on Oracle 9i RAC databases now.
Ours is a 2-node RAC on IBM HACMP with GPFS.

The TNS entry on the client side, I use is given below:


For Failover testing, I connected to the first node, and ran a long SELECT query.
When the SELECT runs, I shut down the instance in the first node, with "shutdown immediate" command.

I get the following message.

ORA-01089: immediate shutdown in progress - no operations are permitted

960 rows selected.

SQL> ex
ORA-25408: can not safely replay call
Here above, if I do not exit and check the V$instance, it shows the session got switched over
to the surviving instance, even though the SELECT got stopped.

Why this is happening, as I am using (ENABLE=BROKEN) and (TYPE=SELECT) options???

Surprisingly, the test succeeds on some other servers with the same DB Physical structure
and memory parameters, by automatically failing over the SELECT query to the surviving node, and without the
query being halted.

Is there any Operating System setting we need to set for successful failover?

Thanks in advance,

Best Regards,