Database Administrators Asked by DavyGravy on February 6, 2021
Hi I am trying to do DBA course that requires that I use Oracle database.
I am using my corporate pc to do it.
I set up the loopback adapter to enable localhost communication and setup the hosts file in system 32. When I start lsnrcrl
However when I try to connect I get an error.
<msg time='2016-07-27T08:59:00.083+02:00' org_id='oracle' comp_id='tnslsnr'
type='UNKNOWN' level='16' host_id='ABCDEF121221'
host_addr='192.168.1.168'>
<txt>27-JUL-2016 08:59:00 * (CONNECT_DATA=(SID=xe)(CID=(PROGRAM=SQLDeveloper)(HOST=__jdbc__)(USER=ABC))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=50619)) * establish * xe * 12505
</txt>
Extra info
The lstnrctrl status is here.
C:Windowssystem32> lsnrctl status
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 27-JUL-2016 13:19:16
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.2.0 - Production
Start Date 26-JUL-2016 15:30:00
Uptime 0 days 21 hr. 49 min. 16 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File C:oraclexeapporacleproduct11.2.0servernetworkadminlistener.ora
Listener Log File C:oraclexeapporaclediagtnslsnrOLDKHQ133304listeneralertlog.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp) (HOST=abcdefg1212221.corporate.corporate.net)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
The last number of the log entry is the return code of the operation. On a successful connection, it is 0. In your case, it is 12505.
12505, 00000, "TNS:listener does not currently know of SID given in connect descriptor"
// *Cause: The listener received a request to establish a connection to a
// database or other service. The connect descriptor received by the listener
// specified a SID for an instance (usually a database instance) that either
// has not yet dynamically registered with the listener or has not been
// statically configured for the listener. This may be a temporary condition
// such as after the listener has started, but before the database instance
// has registered with the listener.
// *Action:
// - Wait a moment and try to connect a second time.
// - Check which instances are currently known by the listener by executing:
// lsnrctl services <listener name>
// - Check that the SID parameter in the connect descriptor specifies
// an instance known by the listener.
// - Check for an event in the listener.log file.
This simply means, you provided an incorrect SID.
xe
is the default SID
in SQL Developer.
Check the correct SID
from the output of lsnrctl status
, and use that for connecting.
Or even better, let's just finally forget the SID
, and use SERVICE_NAME
.
Another possibility is that your database instance was not started, or you do not even have a database created yet.
Answered by Balazs Papp on February 6, 2021
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