Intermittent connection problems from web servers to DB server

[Yoram Ayalon]

we have several web servers, some win2K, some 2003 server, all running
Oracle client 9.2.0.7, running against an Oracle 9.2.0.8 DB on Solaris.

on a totally unpredictable basis, some of our web servers will refuse
to talk to the DB server. The first call to the DB, which is a call to
a stored proc, will fail with error

Microsoft OLE DB Provider for ODBC Drivers (0x80040E14)
[Microsoft][ODBC driver for Oracle][Oracle]ORA-20004

and after a reset of the IIS everything works fine. At the same time
other web servers are not impacted. All web servers have the same
version of MDAC.

On the DB server, I see no error in the alert file, or sqlnet log file
on the web servers, I see no errors in sqlnet.log

any ideas ?

[joel garry]

Metalink Note:216912.1 describes how to do ODBC and sql*net tracing.
An interesting comment: "ODBC tracing may work intermittantly. If
this is the case you can try reinstalling Microsoft's Data Acces
Components (MDAC) from
http://msdn.microsoft.com/library/default.asp?url=/downloads/list/dataaccess.asp
and the reboot the computer. "

You don't see errors in those logs because it is considered an
application error to be handled by the application.

jg
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