Useful tips

How do I fix ORA 12541 TNS no listener?

by Rhyley Bryan

How do I fix ORA 12541 TNS no listener?

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). If the listener is up and running, the problem may lie with the listener not having been associated with the correct instance or protocol.

How do I fix TNS no listener error?

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.

How do I fix ORA 12514 TNS listener does not currently know of service requested in connect descriptor?

Check that the SERVICE_NAME parameter in the connect descriptor of the net service name used specifies a service known by the listener. If an easy connect naming connect identifier was used, check that the service name specified is a service known by the listener. Check for an event in the listener. log file.

How do I get the listener Ora file?

ora file is located in the ORACLE_HOME/network/admin directory. The listener. ora file can also be stored the following locations: The directory specified by the TNS_ADMIN environment variable or registry value.

How do I check my TNS Listener status?

Do the following:

  1. Log on to the host where the Oracle database resides.
  2. Change to the following directory: Solaris: Oracle_HOME/bin. Windows: Oracle_HOME\bin.
  3. To start the listener service, type the following command: Solaris: lsnrctl START. Windows: LSNRCTL.
  4. Repeat step 3 to verify that the TNS listener is running.

How do I restart TNS listener?

To start or stop the listener at the command line:

  1. Open a command window.
  2. Follow the steps listed in “Configuring the Operating System Environment Variables .”
  3. Enter either of the following commands, depending on whether you want to start or stop the listener: lsnrctl start lsnrctl stop.

How do I manually create a listener in Oracle 12c?

Configuring Listening Protocol Addresses Using Oracle Net Manager

  1. Start Oracle Net Manager.
  2. In the navigator pane, expand Local, and then select Listeners.
  3. Select the listener.
  4. From the list in the right pane, select Listener Locations.
  5. Select the protocol from the Protocol list.

How do I know if listener is working?

Checking if Oracle Listener is running on Windows

  1. Open a command window.
  2. Type lsnrctl.
  3. You will get a prompt the reads LSNRCTL>
  4. Type status.
  5. If you see the xe* listeners in READY your database is up and running.

How do I restart Windows listener?

How do I register a listener manually?

ora file.

  1. ALTER system command. — Connect with database and run the following command:
  2. NETMGR utility. Open NET MANAGER Oracle app in windows from START button.
  3. Manually make entry for Servies in listener file. Open the listener file and make entry in the listener.

How do I check my DB listener status?

How do I know if TNS listener is running on Windows?

Is there a listener for ora-12541 in Oracle?

ORA-12541: TNS: no listener ORA-12541 In Oracle, a listener is a process that runs on the database server computer. It manages the traffic of incoming connect requests from clients to the database server, and therefore, is very important.

Why do I get an oracle no listener message?

This can be due to the listener not being started or being incorrectly configured, or it can be due to a network connection problem. Two likely reasons for the error: the database was briefly unavailable at the time when you tried to access. the Oracle client application on your machine is not configured correctly.

Where is the listener file in oracle admin?

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 etwork\\admin on Unix and Windows platforms respectively. When there is any problem with the listener, the user will likely run into ORA-12541. The ORA-12541 message reads, “TNS no listener.”

Is the listener in Ora connected to localhost?

Your listener is setup to only bind to localhost though you are trying to access it using 192.168.0.171 so you will have to add this interface to your listener.ora: Connected to an idle instance. ORA-01034: ORACLE not available