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Dead Connection Detection Not Working (Thru Firewall)

From: Roy <rspeaker_at_yahoo.com>
Date: 27 Apr 2002 19:38:13 -0700
Message-ID: <498db9a0.0204271838.5db52f91@posting.google.com>


I am running 8.0.4.3.1 on AIX 4.3.3. Our users connect through a firewall to the database. We have DCD set up on 10 minute timers, and the firewall has a 30 minute idle timeout. Under normal circumstances, the DCD probe to the client is enough to keep the connection alive, even if the user is truly idle. However, we have, on very rare occasions, had some sort of problem where this stops working. It seems to happen after the server has been up for 8-9 months without a reboot. For whatever reason, the DCD probe doesn't make it through the firewall properly, so the firewall times out the users, but the database connections don't get cleaned up. This leads to us exceeding the maximum number of user connections. Bouncing the database clears current connections but doesn't solve the problem; rebooting the server does. I know we have seen this at least twice, with different apps, both running against 8.0.4.3.1 databases. Does anyone know if this is a known bug in Oracle, AIX, both?

Thanks
Roy Speaker Received on Sat Apr 27 2002 - 21:38:13 CDT

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