Tuesday 26 August 2014

The database is down. Please specify the host credentials to access database restart and diagnostics tools


The database is down. Please specify the host credentials to access database restart and diagnostics tools.
Enterprise manager shows that database is down but in real it is not.
[oracle@grhldb01 trace]$ sqldba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Sep 13 10:38:01 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options

SQL> select name,open_mode from v$database;

NAME    OPEN_MODE
------------
TCHDB   READ WRITE
check the listener status.

[oracle@grhldb01 ~]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 26-AUG-2014 13:16:23

Copyright (c) 1991, 2011, Oracle.  All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date                13-MAR-2014 12:53:12
Uptime                    165 days 23 hr. 23 min. 10 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      ON
Listener Parameter File   /orabin/grid11gR2/grid/network/admin/listener.ora
Listener Log File         /orabin/grid11gR2/base/diag/tnslsnr/grhldb01/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.128.0.42)(PORT=1521)))
Services Summary...
Service "+ASM" has 1 instance(s).
  Instance "+ASM1", status READY, has 1 handler(s) for this service...
Service "TCHDB" has 2 instance(s).
  Instance "TCHDB1", status READY, has 2 handler(s) for this service...
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCHDB1_RAC" has 1 instance(s).
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCHDB2_RAC" has 1 instance(s).
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCHDBXDB" has 2 instance(s).
  Instance "TCHDB1", status READY, has 1 handler(s) for this service...
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCH_ESP_ORANGE_02_RAC" has 2 instance(s).
  Instance "TCHDB1", status READY, has 2 handler(s) for this service...
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCH_GBR_VODA_02_RAC" has 1 instance(s).
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
Service "TCH_GBR_VODA_RAC" has 1 instance(s).
  Instance "TCHDB2", status READY, has 1 handler(s) for this service...
The command completed successfully

it’s runing.

Solution:
select username, account_status from dba_users order by 2;
shows that
DBSNMP EXPIRED
SYSMAN EXPIRED
SYSTEM EXPIRED.

if they are locked then simple unlock with commands:
alter user DBSNMP account unlock;
alter user SYSTEM account unlock;
alter user SYSMAN account unlock;
it’s all, now enjoy with enterprise manager