listener can not start [closed]

Question

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.

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SHOJAIE-PC)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (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_LIST_LISTENER =
  (SID_LIST =
    (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")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = SHOJAIE-PC)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = D:\app\SHOJAIE

Can any one help me ?

Answer 1

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...

Answer 2

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.