Database Networking (MOSC)

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Attempting to resolve ORA-3135 errors

edited Jan 8, 2014 9:47AM in Database Networking (MOSC) 7 commentsAnswered
 We are seeing numerous ORA-3135 errors coming from our application.   The application uses connection pooling and the idle connections are timing out.  This is a single database running in an active/passive environment using a VIP.  We are not using TAF.

The database is 11.2.0.4 on Linux.  The client side is using 10.2.0.4 sqlnet client running on Windows 2003.  

I've turned on and verified that DCD is working. (I've turned on tracing at both the client and server level and verified that DCD is enabled and sending packets by examining the trace logs).

I've connected from the application server via sqlplus and waited for the timeout to occur (as recommended by a Metalink note).  

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