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Full Discussion: TNS Timeout Error when connecting to SQLPLUS through scripts only
Operating Systems Linux Red Hat TNS Timeout Error when connecting to SQLPLUS through scripts only Post 302643837 by jim mcnamara on Sunday 20th of May 2012 08:34:47 PM
Old 05-20-2012
We have has varying causes of the problem which is a listener problem in disguise.
Here are some things we have had to fix:

1. use IP ADDRESSES for your oracle instances in the tnsnames.ora file
2. check: ORACLE_HOME is correct in the script file. Put:
Code:
echo "this is oracle_home: $ORACLE_HOME"

in your scripts. The environment the scripts run in has to match the "manual one".
Do not dismiss this as "not possible" until you have verified ORACLE_HOME for each problem. This messed up a lot of things for developers.

This bit us once:
Code:
[ -r   $ORACLE_HOME/network/admin/tnsnames.ora ]  || echo 'bad tnsnames permissions')

Duplicate listeners for one instance.

All of these caused TNS-12560 as a root cause for timed out errors. Since there are so many possible causes that I have seen, and there are others, if this does not work, open a support ticket with oracle. I assumed Linux on the "user side" and the "oracle server side"
This User Gave Thanks to jim mcnamara For This Post:
aashish.sharma8
 

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LEARN ABOUT CENTOS

pppoe-connect

PPPOE-CONNECT(8)					      System Manager's Manual						  PPPOE-CONNECT(8)

NAME

       pppoe-connect - Shell script to manage a PPPoE link

SYNOPSIS

       pppoe-connect [config_file]

       pppoe-connect interface user [config_file]

DESCRIPTION

       pppoe-connect  is  a  shell  script  which  manages a PPPoE connection using the Roaring Penguin user-space PPPoE client.  If you omit con-
       fig_file, the default file /etc/sysconfig/network-scripts/ifcfg-ppp0 is used.  If you supply interface and user,  then  they  override  the
       Ethernet interface and user-name settings in the configuration file.

       Note that normally, you should not invoke pppoe-connect directly.  Instead, use pppoe-start to bring up the PPPoE connection.

       pppoe-connect  first  reads a configuration file.  It then brings up a PPPoE connection.  If the connection ever drops, a message is logged
       to syslog, and pppoe-connect re-establishes the connection.  In addition, each time the connection is dropped  or  cannot  be  established,
       pppoe-connect executes the script /etc/ppp/pppoe-lost if it exists and is executable.

       The shell script pppoe-stop causes pppoe-connect to break out of its loop, bring the connection down, and exit.

TECHNICAL DETAILS

       pppoe-connect uses the following shell variables from the configuration file:

       ETH    The Ethernet interface connected to the DSL modem (for example, eth0).

       USER   The PPPoE user-id (for example, b1xxnxnx@sympatico.ca).

       PIDFILE
	      A file in which to write the process-ID of the pppoe-connect process (for example, /var/run/pppoe.pid).  Two additional files ($PID-
	      FILE.pppd and $PIDFILE.pppoe) hold the process-ID's of the pppd and pppoe processes, respectively.

       By using different configuration files with different PIDFILE settings, you can manage multiple PPPoE connections.  Just specify  the  con-
       figuration file as an argument to pppoe-start and pppoe-stop.

AUTHOR

       pppoe-connect was written by David F. Skoll <dfs@roaringpenguin.com>.

       The pppoe home page is http://www.roaringpenguin.com/pppoe/.

SEE ALSO

       pppoe(8),  pppoe-start(8),  pppoe-stop(8), pppd(8), pppoe.conf(5), pppoe-setup(8), pppoe-status(8), pppoe-sniff(8), pppoe-server(8), pppoe-
       relay(8)

4th Berkeley Distribution					 21 February 2000						  PPPOE-CONNECT(8)
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