12541 No Listener Error Oracle
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ora 12541 no listener oracle 10g ORA-12541: TNS: no listener Oracle Tips by John Garmany You Asked: I get oracle 12541 tns no listener the ORA-12541 error message when I try to connect through Forms6i and Reports6i Builder. I've started the listener also. I have no problems accessing the database through SQL*Plus. I'veOra 12541 No Listener Toad
checked the listener.ora and tnsnames.ora files and everything seems okay. We Said: From the docs: ORA-12541: TNS no listener Cause: Listener for the source repository has not been started. Action: Start the Listener on the machine where the source repository resides. Basically the Forms server could not find the listener. First check the tnsnames.ora file and ensure that it points ora-12541 tns no listener 11g to the correct server and port. If the Forms server is on another machine, test the TNS resolve with tnsping from the command prompt. Finally, check the listener. First, ensure that your listener service is running. C:\Documents and Settings\ME>lsnrctl stat This should show the status of the listener and the services it is listening for. Remember that when you run SQL*Plus on the database server, it does not need the listener to connect unless you specify the database tnsnames.ora entry.Try to start the listener service using lsnrctl from DOS prompt. set ORACLE_HOME= cd %ORACLE_HOME%/bin lsnrctl start LISTENER If the listener service is not running, re-start the listener service using the Windows task manager or use the DOS command line utility to re-start the Windows service with the "net start" command: C:\Documents and Settings\ME>net start OracleOraDb10g_home1TNSListener You can use the lsnrctl status command to verify that the listener is down, and lsnrctl start to start your listener. If you are on Windows, also verify that the listener service is running. Here are more notes on lsnrctl: Orac
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Ora 12541 Tns No Listener Oracle 11g Client
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Ora 12541 Tns No Listener Toad
discussions in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is archived 14 Replies Latest reply on Mar 7, 2011 6:41 PM by 839770 ORA-12541- http://www.dba-oracle.com/t_ora_12541_tns_no_listener.htm TNS:No Listener Error 839770 Mar 7, 2011 7:59 AM Dear All, I am new to oracle and this forum. I installed Oracle 11g and Oracle forms in my system. When i Try to connect to database thru SQL* Plus, am getting error as "ORA-12541- TNS:No Listener". Same issue when i try to connect https://community.oracle.com/thread/2188674 thru Forms Builder. This is how my tnsnames.ora looks # tnsnames.ora Network Configuration File: C:\DevSuiteHome_2\network\admin\tnsnames.ora # Generated by Oracle configuration tools. EXTPROC_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = Pradeep-PC)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = PLSExtProc) ) ) ORACLE = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = oracle) ) ) LISTENER_ORACLE = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ORACLR_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC)) ) (CONNECT_DATA = (SID = CLRExtProc) (PRESENTATION = RO) ) ) Kindly guide me I have the same question Show 0 Likes(0) 19154Views Tags: none (add) ora-12541Content tagged with ora-12541 This content has been marked as final. Show 14 replies 1. Re: ORA-12541- TNS:No Listener Error Kamran Agayev A. Mar 7, 2011 8:22 AM (in response to 839770) Please post the output of the
log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://dba.stackexchange.com/questions/53380/oracle-client-throwing-ora-12541-tnsno-listener workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags http://www.orafaq.com/wiki/ORA-12541 Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others no listener in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Oracle client throwing ORA-12541: TNS:no listener up vote 3 down vote favorite when i was trying to connect my remote server as- sqlplus SYSTEM/oracle@192.168.0.171:1521/kannel it shows tns no listener me this error- SQL*Plus: Release 11.2.0.2.0 Production on Fri Nov 15 15:36:52 2013 copyright (c) 1982, 2010, Oracle. All rights reserved. ERROR: ORA-12541: TNS:no listener I have checked my listener, it is running [root@roracle bin]# ./lsnrctl status LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 15-NOV-2013 15:42:24 Copyright (c) 1991, 2011, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused tnsnames.ora file contain - KANNEL = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = kannel) ) ) listener.ora file contain SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = kannel) (ORACLE_HOME = /opt/u01/app/product/11.2.0/dbhome_1) (SID_NAME = kannel) ) ) LISTENER= (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) ) ) sqlnet.ora file contain- SQLNET.AUTHENTICATION_SERVICES= (ALL) NAMES.DIRECTORY_PATH= (TNSNAMES,ONAMES,HOSTNAME) Oracle home path - $ORACLE_HOME=/opt/u01/app/
causes this error?[edit] An ORA-12541 error occurs when the listener for the destination server is down or unreachable when you try to connect. This can be due to the listener not being started or being incorrectly configured, or it can be due to a network connection problem. How to fix it[edit] Make sure that the listener is up and listening on the address[edit] For example if you want to connect to the instance with SID=ORCL on a computer named TAMIN_NT using TCP protocol on PORT=1521 then it means that a listener has to be associated with SID = ORCL on machine TAMIN_NT and be listening for TCP protocol on port 1521. The listener must be up and running when one requests a connection. To check that the listener is up and running use operating system facilities (like Start -> Settings -> Control Panel -> Services under NT) or LSNRCTL (Listener Control Program.) The STATUS command of LSNRCTL shows the current state of the listener. If the listener is up and running then it may not have been associated with correct instance or not listening for the specified protocol. This information is the Listener Parameter File ( a text file) usually located under ORACLE_HOME\Network|Admin with the name of listener.ora. The STATUS command of LSNRCTL also shows the current location of this file. However, in my personal experience a STOP and START command in LSNRCTL is required for the STATUS command to show latest changes, especially when there are multiple Oracle homes on the same computer. The listener parameter file consists of two parts. The first part is the specification of the protocols for which this listener is listening, and the second part specifies the instances to which this listener is attached. Check and make sure that they are correct. You may edit listener.ora file either by an ordinary text editor