问题
I'm working on an application which uses Oracle XE 11g as its RDBMS. It was working for several weeks but now I started to get an error message about the connection being refused.
I restarted my system but it did not help. I uninstalled XE, deleted all remaining files (even from registry) and reinstalled it. Now I get another error message:
Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
I've read about this error and others suggested adding a new SID to the listener.ora file:
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
)
If I do this I get another error message:
ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist
My configuration files are: listener.ora
SID_LIST_LISTENER = (SID_LIST =
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
)
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
) )
LISTENER = (DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = AAROLD.in.mycompany.com)(PORT = 1521))
) )
DEFAULT_SERVICE_LISTENER = (XE)
tnsnames.ora
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = AAROLD.in.mycompany.com)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
lsnrctl status returns with:
LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 19-M┴RC. -2013 15:12:24
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 19-M┴RC. -2013 15:01:12
Uptime 0 days 0 hr. 11 min. 11 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File C:\oraclexe\app\oracle\product\11.2.0\server\network\admin\listener.ora
Listener Log File C:\oraclexe\app\oracle\diag\tnslsnr\AAROLD\listener\alert\log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=AAROLD.in.mycompany.com)(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
Do you have any idea what can be the problem? I'm not an Oracle expert so I'm completely in the dark here.
回答1:
Your Oracle DB is down. It may have some problem starting up.
Go to command prompt and type:
SQL>sqlplus / as sysdba
If you get a message "connected to an idle instance" then type
SQL>startup
and let me know the message you get. If you don't get the "connected to an idle instance" message on SqlPlus startup, the type:
SQL>set lines 80 pages 50
SQL>select * from v$database;
and post the output here.
回答2:
I had the exact same problem and after spending almost 4 hours trying to find and answer, finally adding
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server)
)
to my listener.ora and restarting both XE services solved the issue. I am using 11.2.0 (XE) on windows 7 x64 with out any hitch till yesterday. A reboot of my PC this morning caused the listener to not find the SID.
Now I am backing up both listener.ora and tnsnames.ora.
btw, forgot to mention I changed the hostname in both the files from bob.mycompany.com to localhost.
回答3:
On Windows 7 64 bit, Orcale XE 11 my OracleXXETNSListener service was not running and did terminate immediately when I tried to start it.
- Adding
(SID_DESC = (SID_NAME = XE) (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server) )
to my
C:\oraclexe\app\oracle\product\11.2.0\server\network\ADMIN\listener.ora
changing the hostname to localhost
restarting the OracleServiceXE service under System - Services solved the issue.
So the complete listener.ora section looks like:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\servers\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\servers\oraclexe\app\oracle\product\11.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = XE)
(ORACLE_HOME = C:\servers\oraclexe\app\oracle\product\11.2.0\server)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)
DEFAULT_SERVICE_LISTENER = (XE)
回答4:
I had a similar problem, and I fixed it by removing the "IPC" lines from both listener.ora and tnsnames.ora.
On listener.ora, I removed:
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
On tnsnames.ora, I removed:
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)
It may have been a overkill, but it's finally fixed, after several hours!
回答5:
I had the same problem, the error was I have changed the name of my machine . This was solved by editing listener.ora and renaming the HOST:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = hostname_of_my_machine)(PORT = 1521))
)
)
来源：https://stackoverflow.com/questions/15501832/oracle-xe-stopped-working-tns-listener-refused-connection