I have installed Oracle 11g R2 database, I used it for almost a month now and then today when I tried to log in into it I am getting this error.
An error was encountered performing the requested operation:
Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
Vendor code 12505)
I opened the enterprise manager and found that the database instance & Agent Connection Instance was down, when I tried to start that I got this error,
" SQL*Plus: Release 126.96.36.199.0 Production on Thu Aug 22 15:48:40 2013 Copyright (c) 1982, 2010, Oracle. All rights reserved. SQL> SQL> ERROR: ORA-12640: Authentication adapter initialization failed "
lsnrctl status output:
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
Version TNSLSNR for 64-bit Windows: Version 188.8.131.52.0 - Production
Start Date 22-AUG-2013 15:38:25
Uptime 0 days 0 hr. 53 min. 40 sec
Trace Level off
Security ON: Local OS Authentication
Listener Parameter File C:\app\psabneka\product\11.2.0\dbhome_1\network\admin\listener.ora
Listener Log File c:\app\psabneka\diag\tnslsnr\psabneka-lap\listener\alert\log.xml
Listening Endpoints Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
Please suggest some workaround.
hope this helps