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Problem getting disconnected from server after one hour

I am getting this error:

java.sql.SQLException: [Microsoft][ODBC driver for Oracle][Oracle]ORA-12154:at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source) 

The connection is disconnected in one hour's time. It connects the first time, but after one hour it automatically disconnects. What is the problem that causes this error?

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I'm going to guess that you may be connecting your application to the database through a firewall and the firewall is timing out your network connection. You should try to run SQL*Plus on the Windows application server host and see if it is able to remain connected for more than one hour. That test will eliminate the ODBC and ODBC-to-JDBC bridge from the list of possible suspects. If your SQL*Plus session is terminated (and you get a ORA-12154 or similar), then it is likely a network configuration problem on one of the hosts or a firewall in between them.

This was first published in October 2004

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