TNS Linux Error: 29: Illegal seek

[DB_HOME]@:/home/oracle$ lsnrctl start

LSNRCTL for Linux: Version – Production on 24-JUN-2010 16:46:42

Copyright (c) 1991, 2004, Oracle.  All rights reserved.

Starting /home/oracle/product/infra/

bin/tnslsnr: please wait…

TNS-12537: TNS:connection closed
TNS-12560: TNS:protocol adapter error
TNS-00507: Connection closed
Linux Error: 29: Illegal seek

Oracle Net Services – Version: to
This problem can occur on any platform.

I tried setting tcp.validnode_checking = no in sqlnet.ora

There was no output for : netstat -an | grep 1521

I checked /etc/hosts file for the entry localhost.localdomain localhost


TNS Listener fails while attempting to initiate subscription to ONS node down event.

Level 16 TNS Listener trace shows the last action:

[01-JUL-2005 10:16:59:727] nsglonsinit: Initiated subscription for node down event

Same symptoms and corrective action found in Bug 4227455 OCS_MAIN_SOLARIS_050304 – UNABLE TO START THE SECOND LISTENER of if OS User is unable to read the /etc/hosts file.

To implement the solution, please execute the following steps:

1. Explicitly disable the 10g TNS Listener’s subscrition to ONS by editing the listener.ora file and add the parameter below:


where <listener_name> would be replaced with the actual listener name configured in the listener.ora file.

For example, if the listener name is LISTENER (default), the parameter would be:


– Save the listener.ora file

2. Start the TNS Listener from a new LSNRCTL prompt:

lsnrctl <return>

LSNRCTL> start

References :
Note 284602.1


About mpoojari
Oracle Database/Applications Administrator

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