Tns-12541:tns:no Listener Tns-12560:tns:protocol Adapter Error Tns-00511:no listener Linux error:

Source: Internet
Author: User



Today is 2014-06-17, encountered a very strange problem, may test the reason for monitoring changes before, causing the monitoring to automatically shut down after startup, this is to record the entire process,
The Listening configuration file information is as follows:


[oracle@dg1 admin]$ more listener.ora 
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.4.181)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = /u01/app/oracle
SID_LIST_LISTENER=  
  (SID_LIST=  
      (SID_DESC=  
         (GLOBAL_DBNAME=dg1)  
         (ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1)  
        (SID_NAME=dg1)  
   )  
  )


automatically shuts down 3 seconds after the start of monitoring, as follows:


[oracle@dg1 admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-JUN-2014 22:54:06

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.4.0 - Production
System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/diag/tnslsnr/dg1/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.4.181)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.4.181)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.4.0 - Production
Start Date                17-JUN-2014 22:54:08
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/dg1/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.4.181)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "dg1" has 1 instance(s).
  Instance "dg1", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@dg1 admin]$ 
[oracle@dg1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 17-JUN-2014 22:55:44

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.4.181)(PORT=1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
TNS-12541: TNS:no listener
 TNS-12560: TNS:protocol adapter error
  TNS-00511: No listener
   Linux Error: 111: Connection refused
[oracle@dg1 admin]$ 



To view the log as follows:


Started with pid=1750
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.4.181)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Listener completed notification to CRS on start

TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE
WARNING: Subscription for node down event still pending
17-JUN-2014 22:50:15 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=dg1)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647552)) * status * 0
WARNING: Subscription for node down event still pending
17-JUN-2014 22:50:18 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=dg1)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647552)) * status * 0
Tue Jun 17 22:54:08 2014
System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/diag/tnslsnr/dg1/listener/alert/log.xml
Trace information written to /u01/app/oracle/diag/tnslsnr/dg1/listener/trace/ora_1774_140208538629888.trc
Trace level is currently 0

Started with pid=1774
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.4.181)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Listener completed notification to CRS on start

TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE
WARNING: Subscription for node down event still pending
17-JUN-2014 22:54:08 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=dg1)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=186647552)) * status * 0



View the logs no problem found, check MOS:
Cause of the problem:



1. There is possibly a incorrect IP Address specified for the host in the/etc/hosts file.
For example:
192.168.101.101 prod1.us.oracle.com Prod1
Whereas the actual IP address for the host ' prod1.us.oracle.com ' is 192.168.101.110

2. Also, the localhost reference may be incorrect or missing from the/etc/hosts file.

3. Oracle May is not having read access to/etc/nsswitch.conf file.



Problem Solving methods:



To implement the solution, please execute the following steps:



1. Correct the mapping in the/etc/hosts file by adding/correcting the IP address and/or hostname reference for the UNIX/L Inux Server (both long and short host names).
For example:



# Add or edit the/etc/hosts file to include a valid entry for the Server:
192.168.101.110 prod1.us.oracle.com Prod1



2. Check that the localhost loopback name and address is correct (both long and short host names).
An example of a correct localhost entry would be as follows:



127.0.0.1 localhost.localdomain localhost



3. Remember to save the/etc/hosts file and then start the listener.

4. Check permissions on/etc/nsswitch.conf file to ensure group and other has read access.



-If Necessary Change permisions on/etc/nsswitch.conf as follows:



chmod 644/etc/nsswitch.conf



After modifying the host profile/etc/hosts, the problem can be resolved:


127.0.0.1       localhost.localdomain      localhost     dg1
::1     localhost.localdomain           dg1
192.168.4.181 dg1
192.168.4.182 dg2


################### #343295.1######################


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