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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
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•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
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•target host or object does not exist
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•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
ORA-01012: not logged on

ORA-01012: not logged on

2005-05-12       - By Chirag DBA
Reply:     1     2     3  

Any command I give, gives the same error. I saw all the BP. All are
running fine.

Any idea why this is happening?

SQL> select open_mode from v$database;
select open_mode from v$database
*
ERROR at line 1:
ORA-01012 (See ORA-01012.ora-code.com): not logged on


SQL> desc v$database;
ERROR:
ORA-01034 (See ORA-01034.ora-code.com): ORACLE not available


SQL> select count(*) from v$session;
select count(*) from v$session
*
ERROR at line 1:
ORA-01012 (See ORA-01012.ora-code.com): not logged on

Regards - Chirag
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