This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) Rapid Visibility (RaV) process, and therefore has not been subject to an independent technical review.
The information in this document applies to:
Oracle Net Services - Version: 10.1.0.3 This problem can occur on any platform.
Symptoms
The listener fails to start with the following errors: TNS-12537: TNS:connection closed TNS-12560: TNS:protocol adapter error TNS-00507: Connection closed Linux Error: 29: Illegal seek Generic to Unix platforms.
Cause
Wrong syntax in hosts file and also due to the the tnslsnr process was enhanced in 10.1.0.3 to support FAN(Fast Application Notification) via ONS (Oracle Notification Services). This new code opens a socket open on localhost. Therefore "localhost" should be defined on the system.
This new code opens a socket open on localhost. Therefore "localhost" should be defined on the system.
Fix
Change /etc/hosts file to include 127.0.0.1 localhost.localdomain localhost
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Subject:
10g TNS Listener Fails To Start With Errors: TNS-12537...Error: 29: Illegal seek
This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) Rapid Visibility (RaV) process, and therefore has not been subject to an independent technical review.
Applies to:
Oracle Net Services - Version: 10.1.0.0 to 10.2.0.2 This problem can occur on any platform.
Symptoms
Unable to start an Oracle10g R1 (or R2) TNS Listener on Unix:
For example:
$ lsnrctl start LSNRCTL for HPUX: Version 10.1.0.4.0 - Production on 01-JUL-2005 10:16:59 Copyright (c) 1991, 2004, Oracle. All rights reserved. Starting /db02/product/10.1/bin/tnslsnr: please wait... TNS-12537: TNS:connection closed TNS-12560: TNS:proto adapter error TNS-00507: Connection closed HPUX Error: 29: Illegal seek
Changes
Verify the user attempting to start the TNS Listener process has read permissions on the /etc/hosts file, and that this file contains the localhost entry:
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.
Solution
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:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_=OFF
where 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:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF
- Save the listener.ora file
2. Start the TNS Listener from a new LSNRCTL prompt:
lsnrctl
LSNRCTL> start
References
Note 284602.1 - 10g Listener: High CPU Utilization - Listener May HangNote 294730.1 - TNS-12537, TNS-12560, TNS-00507 Linux Error: 29: Illegal seek error When Starting the Listener
