What causes an ora-12541 error when trying to connect to a server?

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What causes an ora-12541 error when trying to connect to a server?

If you see this error message in the alert log file of your primary database in a dataguard environment, it is most likely that listener on the standby database host(s) is not running. As a result, primary database will not be able to ship redo data to the standby database.

Fatal NI connect error 12541, connecting to: (DESCRIPTION= (SDU=32768) (ADDRESS= (PROTOCOL=tcp) (HOST=adurw1p.lac.com) (PORT=1522)) (CONNECT_DATA= (SID=acbu) (CID= (PROGRAM=C:MsofficeOFFICE11EXCEL.EXE) (HOST=WN136085) (USER=n136085)))) VERSION INFORMATION: TNS for 32-bit Windows: Version 10.2.0.3.0 – Production Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 10.2.0.3.0 – Production Time: 10-DEC-2008 12:26:00 Tracing not turned on.

If you see this error message in the alert log file of your primary database in a dataguard environment, it is most likely that listener on the standby database host(s) is not running. As a result, primary database will not be able to ship redo data to the standby database.

Fatal NI connect error 12541, connecting to: (DESCRIPTION= (SDU=32768) (ADDRESS= (PROTOCOL=tcp) (HOST=adurw1p.lac.com) (PORT=1522)) (CONNECT_DATA= (SID=acbu) (CID= (PROGRAM=C:MsofficeOFFICE11EXCEL.EXE) (HOST=WN136085) (USER=n136085)))) VERSION INFORMATION: TNS for 32-bit Windows: Version 10.2.0.3.0 – Production Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 10.2.0.3.0 – Production Time: 10-DEC-2008 12:26:00 Tracing not turned on.

Note. Prior to version 11gR1, this type of “NI 12170 Fatal Connection Error” was typically logged in sqlnet.log. This email describes a problem that occurs when there is a firewall between your client and the database server. For full details, please log in to your current My Oracle Account support. Don’t have a My Oracle Support account? Click here to get started!

secondary error code ns: 12560 Reply: Ni trap fatal error 12170 is related to main error ORA-12170: ORA-12170: TNS: connection timeout sent

There are many possible causes for ORA-12541 TNS: No listener error message. For example scenario: #1 – The Tnsnames.ora file may not contain the correct important login information.

What causes an ora-12541 error when trying to connect to a server?

What is causing this error? What is causing this error? The ORA-12541 error occurs when the Spot Server Listener is down or not available when trying to connect. It could definitely be because the phone hasn’t been started yet, or it wasn’t created correctly, or it could be due to a network connection issue.

Why do I get an ora-12541 no listener error?

You are experiencing the “ORA-12541: TNS: no listener” error on the Symantec Data Loss Prevention Enforcement server. Learn how to change the state of the Oracle Attendee service and restart the service if necessary.

How do I fix ORA 12541 error?

4 7 replies

  1. Step – Change listener. This statement is located in: Windows: %ORACLE_HOME%\network\admin\listener.
  2. Step 4: Restart the Oracle services. Windows: WinKey + r services.msc. Linux (CentOs): Restart sudo systemctl oracle-xe.

When do I get an ora-12541 error?

This form of the ora-12541 error is common when the index or listener processes are in the middle of startup, i.e. when the database (mysid in this case) has not been written to the speaker. The listener received another request to establish a connection that would provide a database or other service.


When does an Ora 12541 error occur in a DBA listener?

This form of ORA-12541 error is common when the repository or listener processes are running in the middle of startup, or possibly when the database (in this case mysid) is not connected to the server. root> oerr ora 12514 ORA-12514: tns:listener currently ignoring requested service in encapsulation descriptor

How do I fix ORA 12541 TNS no listener?

First, of course, make sure the earpiece is working. To do this, go to Services on NT using the Control Panel or Manage Listen Broadcast (LSNRCTL). If the listener is working, the problem may be that the listener does not match the correct instance in addition to the protocol.

What causes an ora-12541 error when trying to connect to a server?

1 What causes this single error? What is causing this error? The ORA-12541 error occurs when the target audience of the server is below or unable to reach you when trying to connect. This may be due to the listener not starting and being configured incorrectly, or due to a network connection issue.

Why do I get an ora-12541 no listener error?

“ORA-12541: TNS: no listener” error on Symantec Data Loss Enforcement Prevention server. Learn how to successfully check the status of the Oracle Listener service and restart or restart the service now if necessary.

How do I fix ORA 12541 error?

1 answer

  1. Step – Change listener. or one. This file is on Windows: located in: %ORACLE_HOME%\network\admin\listener.
  2. Step 2: Restart the Oracle services. Windows: WinKey + tservices.msc. Linux (CentOs): sudo systemctl restarts oracle-xe.

When do I get an ora-12541 error?

This ORA-12541 error usually takes place when the database or fanbase processes are currently attached to run or when the index (mysid in your case) has not been registered in the listener. The listener received a request to establish a good connection to the database and another service.

When does an Ora 12541 error occur in a DBA listener?

This form of ORA-12541 error is common when the database or listener processes are in the middle of startup, i.e. when the database (mysid in your own case) is not registered with the listener. oerr root > ora 12514 ORA-12514: TNS: listener currently does not know service is being requested in country descriptor

How do I fix ORA 12541 TNS no listener?

First, make it clear that the listener is driving. To do this, go to Services under NT in the Control Panel or check the Listener (LSNRCTL). If the listener gets up and leads, the problem may be that the entire listener has not been associated with the correct event log.