Oracle Ora 12541 Error
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ora 12541 tns no listener but listener is running ORA-12541: TNS: no listener Oracle Tips ora 12541 no listener oracle 11g by John Garmany You Asked: I get the ORA-12541 error message when I try to connect through Forms6i and Reports6i Builder. tns no listener error in oracle 11g I've started the listener also. I 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 listenerOra-12541 Tns No Listener Toad
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 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. ora-12541: tns:no listener linux 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: Oracle listener lsnrctl command Oracle listener lsnrctl command Oracle listener security tips Blocking Oracle access by IP Addresses �� Burleson is the American Team Note: This Oracle documentation was crea
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Tns-12560: Tns:protocol Adapter Error
discussions in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is archived 14 Replies Latest reply on Mar 7,
Ora-12514 Tns No Listener
2011 6:41 PM by 839770 ORA-12541- 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 http://www.dba-oracle.com/t_ora_12541_tns_no_listener.htm 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 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 = https://community.oracle.com/thread/2188674 (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) 20448Views 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 following command from db server : lsnrctl statusIf it's down, then run lsnrctl startand post all output Kamran Agayev A. Oracle ACE - - - - - - - - - - - - - - - - - - - - - My Oracle Video Tutorials - http://kamranagayev.wordpress.com/oracle-video-tutorials/ 1 person found this helpful Like Show 0 Likes(0) Actions 2. Re: ORA-12541- TNS:No Listener Error 729964 Mar 7, 2011 9:22 AM (in response to 839770) go to start r
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 http://www.orafaq.com/wiki/ORA-12541 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 no listener 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 tns no listener 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 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=