ORA-01012: not logged on

Hi all,

For sometime my production database was not letting me to do any operations:

I found these alerts
SQL> select name from v$database;
select name from v$database
*

ERROR at line 1:
ORA-01012: not logged on

SQL> select * from dba_users;
select * from dba_users
*

ERROR at line 1:
ORA-01012: not logged on

But I could see the ora_ processes were running and even TNS was up and running.

After sometime..I tried it again and is working fine. Is this a bug, Can anyone tell me if you have faced the same problem. The SQL*Plus Release is 9.2.0.4.0.

Thanks,
Ananth

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