Oracle Error 12541
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ORA-12541: TNS: no listener Oracle TipsOra-12541: Tns:no Listener Linux
by John Garmany You Asked: I get the ORA-12541 error message when I try to connect through Forms6i and Reports6i Builder. I've started the listener also. I
Ora 12541 Tns No Listener Oracle 11g Client
have no problems accessing the database through SQL*Plus. I've 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 tns no listener error in oracle 11g could not find the listener. First check the tnsnames.ora file and ensure that it points 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 li
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,
Tns-12560: Tns:protocol Adapter Error
or it can be due to a network connection problem. How to fix it[edit] Make ora-12541 tns no listener windows sure that the listener is up and listening on the address[edit] For example if you want to connect to the instance with tns-12541: tns:no listener linux 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 http://www.dba-oracle.com/t_ora_12541_tns_no_listener.htm 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. http://www.orafaq.com/wiki/ORA-12541 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 or by using the Oracle Net8 Assistant utility. Just keep in mind that a restart of the listener is required for the changes to be effective. Here is an example listener.ora file: # Filename......: listener.ora # Node..........: local.world # Date..........: 24-MAY-94 13:23:20 ################ LISTENER = (ADDRESS_LIST = (ADDRESS= (PROTOCOL= IPC) (KEY= oracle.world) ) (ADDRESS= (PROTOCOL= IPC) (KEY= ORCL) ) (ADDRESS= (COMMUNITY= NMP.world) (PROTOCOL= NMP) (SERVER= NTSERVER) (PIPE= ORAPIPE) ) (ADDRESS= (PROTOCOL= TCP) (Host= ntserver) (Port= 1521) ) (ADDRESS= (PROTOCOL= TCP) (Host= ntserver) (Port= 1526) ) (ADDRESS= (PROTOCOL= TCP) (Host= 127.0.0.1) (Port= 1521) ) (ADDRESS= (PROTOCOL= SPX) (Service= ntserver_lsnr) ) ) STARTUP_WAIT_TIME_LISTENER = 0 C
Anil Kumar on June 26, 2013 All Posts, Database, Oracle DBA 18 Comments Resolved ORA-12541: TNS no listener error 4.57 (91.43%) 7 votes N no. of articles you will find on http://itbloggertips.com/2013/06/resolved-ora-12541-tns-no-listener-error/ the internet about "ORA-12541 TNS no listener error" but still finding an effective solution. Don't worry this solution helped me a lot and I hope it will help you too. I got the same issue while working on Oracle 10g database then I decided to share my experience and steps to resolve this issue. Error Message: ORA-12541 TNS no listener error Resolution: Now you have to follow below no listener mentioned steps to resolve the ORA-12541 issue. Step-1: First check your listener status. C:\>lsnrctl status The above command will show the current status of your listener. Step-2: Start the listener, if listener is not running. C:\>lsnrctl start This command will start all your listener services. Step-3: Stop the listener, if listener is running. C:\>lsnrctl stop This command will stop all your listener services. Step-4: Now restart the listener. C:\>lsnrctl tns no listener reload This command will restart all your listener services. Note: If you want to see all the available listener commands. Type lsnrtcl help on command prompt and you will get all available options. C:\>lsnrctl help LSNRCTL for 32-bit Windows: Version 11.2.0.2.0 - Production on 02-JUL-2015 20:25:14 Copyright (c) 1991, 2010, Oracle. All rights reserved. The following operations are available An asterisk (*) denotes a modifier or extended command: start stop status services version reload save_config trace change_password quit exit set* show* Step-5: One last and very important thing which you have to do. Open sqlnet.ora file and make the changes as suggested. Change NTS to NONE SQLNET.AUTHENTICATION_SERVICES = (NONE) Now restart the listener services and your listener problem ORA-12541 will be resolved. If this is not working, do write in comment section. I will try to help you at the earliest. Get Free Blogging Tips & Technology updates in your Email !!! Subscribe via RSS feed 0 Related PostsFixed ORA-12518: TNS:listener could not hand off client connectionResolved ORA-12528: TNS:listener: all appropriate instances are blocking new connections errorFixed: ORA-01722: invalid numberOracle DBA TipsHow to Enable/Disable Archive Log Mode in Orac