TNS Timeout Error when connecting to SQLPLUS through scripts only


 
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Operating Systems Linux Red Hat TNS Timeout Error when connecting to SQLPLUS through scripts only
# 8  
Old 05-20-2012
Maybe you are creating connections too fast. Try to put a sleep after each invocation of sqlplus.
# 9  
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:
# 10  
Old 06-22-2012
The issue was resolved by changing the database SID, the route that packets were taking was over trafficked as told by a DBA.
All well now... !!
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