OID Firewall / Data Connection Timeouts

Question

Hello
I have an OID cluster (11.1.0.5) setup within our environment and have a firewall installed between the OID servers and the database servers.  The defualt connection timeout for the DB connection was increased to three hours, but after three hours I keep getting the periodic failures of OID / enterprise manager.  I have set the idle connection timeout and retries in the OID configuration, but this still seems to occur even with the timeouts / retries configured.  Is there a max session length or some other way to tell OID to close db connections after a period of time so that the max session is not reached?
Also, if I am just querying OID with a script, it seems to work past the three hours but I think this is more of a cache thing whereby it is responding with cached entries.  When I go to enterprise manager and try to manage OID, I will get the failure after the timeout with a LDAP error code 49 error and need to submit a bunch of requests to OID to refresh the connection to the database.
Any help you can give would be appreciated.
Thanks
Nick

Answer 1

Alex,
Thanks for the prompt reply.
Not having Maximum times in ODP will make things complicated and a myriad of race conditions can occur.
There is an involved example of a Transaction Timeout Cancel that I could implements with a an application Maximum timer on page 5-27 of the Oracle Data Provider for .NET Developer's Guide and it is not easy to implement
However, it is not described anywhere on how to implement a Maximum Connection Timeout.
In the example below from the docs the application will block at the Open() call:
// Connect
string constr = "User Id=scott;Password=tiger;Data Source=oracle";
OracleConnection con = new OracleConnection(constr);
con.Open();
So do we do the following:
// Connect
string constr = "User Id=scott;Password=tiger;Data Source=oracle";
OracleConnection con = new OracleConnection(constr);
*//Set_Application Timer*
con.Open();
OnApplicationTimer()
con.Close()
//Do application timeout processing
What will the Close() do for us here? What will happen if the Connection open is still in progress when we try to close it?
Should we forget attempting to Close() and wait until Oracle decides to return in the first method as shown below?
OnApplicationTimer()
//Do application timeout processing but don't explicitly send Close()
// Connect
string constr = "User Id=scott;Password=tiger;Data Source=oracle";
OracleConnection con = new OracleConnection(constr);
*//Set_Application Timer*
con.Open();
//Eventually it will timeout. If succesful, clo0se immediatly since it is too lpate.
Nathan