My listener in Oracle 11g R2 can not start . When I want to give the status of that, the error in below is shown:

Connecting to <ADDRESS=<PROTOCOL=tcp><HODT=><PORT=1521>>
TNS-12541 : TNS:no listener
 TNS-12560 : TNS:protocol adapter error
  TNS-00511 : NO LISTENER 
   64-bit Windowns Eroor : 61: Wnknown error

My tnsnames.ora is :

# tnsnames.ora Network Configuration File: D:\app\SHOJAIE\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

      (SID = CLRExtProc)

      (SERVICE_NAME = orcl)

My listener.ora is :

# listener.ora Network Configuration File: D:\app\SHOJAIE\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\app\SHOJAIE\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\app\SHOJAIE\product\11.2.0\dbhome_1\bin\oraclr11.dll")



Can any one help me ?

closed as unclear what you're asking by Colin 't Hart, Marco, Andriy M, joanolo, miracle173 Jun 12 '17 at 4:07

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  • Looks like you've installed some Quest software that's messed with your paths. What is %ORACLE_HOME% set to! and is it at the beginning of your PATH? – Philᵀᴹ Jan 29 '14 at 6:25
  • set ORACLE_HOME = D:\app\SHOJAIE\product\11.2.0\dbhome_1 – saeed.sh Jan 29 '14 at 7:14
  • but my quest software in C:\program files <x86>\Quest – saeed.sh Jan 29 '14 at 7:15
  • What is %TNS_ADMIN% set to? – Philᵀᴹ Jan 29 '14 at 8:32

Try to Restart Oracle Service by following Commands

net stop oracleserviceORCL;
net start oracleserviceORCL;

and then start listener first, if it is not already started by this command.

lsnrctl start listener;

and update me if it help...

  • when i write this command , the error in below is shown : TNS-12560 : TNS:protocol adapter error TNS-00530 : Protocl adapter error – saeed.sh Jan 29 '14 at 5:54
  • what error are you getting when you ping ORCL, like: SQL> tnsping ORCL; – N J Jan 29 '14 at 5:58
  • @saeed - Check answer updates. – N J Jan 29 '14 at 6:09
  • when i write netca in command prompt , i dont see any listener to configure and when i want to add , some of error is occured like : TNS - 04415 : file i/o error caused by :java.io.FileNotException : C:\Program files <x86>\common Files \ Quest Shared \ instantclient-basic-win-x86-\listener.ora <access is denied > – saeed.sh Jan 29 '14 at 6:10
  • open CMD with Administrator and the execute netca command, or goto start>all progrram>oracle > configuration and migration > Oracle Configuration Assistance and right click and select 'run as administrator' and try to create listener – N J Jan 29 '14 at 6:16

In my case, I tried to start the listener via console:

> lsnrctl star

This command printed the following error:

TNS-12560: TNS:protocol adapter error
TNS-00583: Valid node checking: unable to parse configuration parameters

So, I performed the following actions:

  1. Check if Oracle listener.ora or sqlnet.ora file contains special characters
  2. Check if Oracle listener.ora or sqlnet.ora` file are in wrong format or syntax
  3. Check if Oracle listener.ora or sqlnet.ora file have some left justified parenthesis which are not accepted by oracle parser.

Have a look at these files and check the proper syntax. If possible remove/rename sqlnet.ora and try to restart the listener. Or remove/rename both listener.ora or sqlnet.ora file and recreate it properly. These will defenitely resolve the issue.

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