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ora-12541 tns no listener 11g ORA-12541: TNS: no listener Oracle Tips by John Garmany You Asked: I get the ORA-12541 error tns no listener error in oracle 11g 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've checked the listener.ora and ora-12514 tns no listener 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 to the correct server andOra 12541 Tns No Listener Toad
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: Oracle listener lsnrctl command Oracle listener lsnrctl command Oracle listener security tips
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Ora-12541: Tns:no Listener Linux
more about Stack Overflow the company Business Learn more about hiring developers or posting ora 12541 tns no listener oracle 11g client ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack tns-12560: tns:protocol adapter error Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Oracle client ORA-12541: TNS:no listener [closed] up vote 20 down vote http://www.dba-oracle.com/t_ora_12541_tns_no_listener.htm favorite 1 I am new on Oracle database, but I have one issue, now on my Database server (server1) listener and database instance is run correctly and I can use sqlplus to connect to this DB, But when I connect to database by using other server, I check the TNS configuration is correct but system said ERROR: ORA-12541: TNS:no listener My database is Oracle 10gR2 So how can http://stackoverflow.com/questions/13358656/oracle-client-ora-12541-tnsno-listener I solve this issue? oracle listener share|improve this question edited Sep 23 '14 at 9:26 subhashis 1,55672430 asked Nov 13 '12 at 9:58 aliasosx 1332212 closed as off-topic by Jens Erat, Annjawn, Eric Brown, g00glen00b, showdev Feb 21 '14 at 23:30 This question appears to be off-topic. The users who voted to close gave this specific reason:"Questions on professional server- or networking-related infrastructure administration are off-topic for Stack Overflow unless they directly involve programming or programming tools. You may be able to get help on Server Fault." – Jens Erat, Annjawn, Eric Brown, g00glen00b, showdevIf this question can be reworded to fit the rules in the help center, please edit the question. 3 should be a serverfault.com / dba.stackexchange.com question –Raptor Nov 13 '12 at 10:01 But when I connect to database by using other server You mean to say that when you try to connect the same database from server? –user75ponic Nov 13 '12 at 10:01 I mean I connect to Database server by client by sqlplus or sql developer on Sqldeveloper Error "An error was encountered performing the requested operation: The Network Adapter could not establish the connection Vendor code 20" –aliasosx Nov 13 '12 at 10:04
Digital Records Management Enterprise Content Management Strategy Digital Asset Management Oracle Imaging & Process Management Web Content Management Oracle WebCenter Portal Enterprise Portal Support Enterprise Portal Strategy Enterprise Portal Upgrade Oracle WebCenter Sites Sourcing Staffing https://www.tekstream.com/resources/ora-12541-tns-no-listener/ & Recruiting Recruiting Managed Services Candidate Registration Technical Focus Client Opportunities Support http://www.orafaq.com/wiki/ORA-12541 Solutions Training Legacy to Oracle WebCenter Oracle Documents Cloud Service Next Generation AP Automation & Dynamic Discounting Oracle WebCenter Contract Lifecycle Management (CLM) Search ORA-12541: TNS: no listenerYou are here: Home / Resources / ORA-12541: TNS: no listener ORA-12541 In Oracle, a listener is a process that runs no listener on the database server computer. It manages the traffic of incoming connect requests from clients to the database server, and therefore, is very important. Each time a client requests a network session with a server, it is the listener that receives this client request. The listener will check to see that the client information matches the listener information, and thereby grant tns no listener (or deny) the request. To learn more about listeners, click here. Generally, the listener.ora file can be found in $ORACLE_HOME/network/admin or ORACLE_BASE\ORACLE_HOME\network\admin on Unix and Windows platforms respectively. When there is any problem with the listener, the user will likely run into ORA-12541. The Problem The ORA-12541 message reads, “TNS no listener.” This happens if the listener is either down as it attempts to make a connection or if it has not been started or improperly configured. In addition, it may be caused by a connectivity problem with the network. To figure out what may be causing the problem, follow the solution steps outlined below. The Solution First, make sure that the listener is up and running. To do this, go to the Control Panel into Services under NT or listener control program (LSNRCTL). C:\Documents and Settings\ME>lsnrctl stat This should show the current status of the listener. If the listener is currently not running, re-start the listener service by running the “net start” command by filling in “XX” with the version being used: C:\Documents and Settings\ME>net start OracleOraDbXXg_hom
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 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.