TNS-12555 / TNS-12560 / TNS-00525 Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPR

TNS-12555 / TNS-12560 / TNS-00525 Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))

Problem:

LSNRCTL for Linux: Version 10.2.0.1.0 – Production on 21-SEP-2011 12:54:12

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Welcome to LSNRCTL, type “help” for information.

LSNRCTL> start

Starting /u01/app/oracle/oracle/product/10.2.0/db_1//bin/tnslsnr: please wait…

TNSLSNR for Linux: Version 10.2.0.2.0 – Production

System parameter file is /u01/app/oracle/oracle/product/10.2.0/db_1/network/admin/listener.ora

Log messages written to /u01/app/oracle/oracle/product/10.2.0/db_1/network/log/listener.log

Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))

TNS-12555: TNS:permission denied

TNS-12560: TNS:protocol adapter error

TNS-00525: Insufficient privilege for operation

Linux Error: 1: Operation not permitted

Listener failed to start. See the error message(s) above…

LSNRCTL>

Cause:

1) Ensure that /tmp/.oracle or /var/tmp/.oracle directory exists.

2) Confirm that the DBA user who is trying to start the listener has adequate read and write permissions on the directory specified above. The
permissions should be 777.

3) If the /tmp directory has reached full capacity, this would cause the listener to fail to write the socket files.

Solution

To implement the solution, please use the following example:

1. cd /var/tmp

2. Check the whether the .oracle directory exists:

cd .oracle

3. If the directory does not exist, request the System Administrator create the directory and set the ownership as root:root with the permissions
set to 01777

mkdir /var/tmp/.oracle 

chmod 01777 /var/tmp/.oracle 

chown root /var/tmp/.oracle 

chgrp root /var/tmp/.oracle

4. Next try starting the TNS Listener using the ‘lsnrctl start <listener_name>’ command