Hello,

We have a firewall between our MidTier server and ARS system.  The firewall is 
configured to drop tcp connections after being idle for 60 minutes 
(typical/default firewall setting).  Several MidTier user sessions will make 
use of a shared tcp connection so you might have 100 sessions but significantly 
fewer tcp connections.  During idle times (like at night), the firewall will 
discard these idle tcp connections but the MidTier server will still retain 
these tcp references (this can be seen by using "netstat -anto").  So, when 
users get back on the system, MidTier apparently is trying to utilize one of 
these defunct tcp connections so you end up with problems like ARERR 91 rpc 
timeouts because these tcp connections are broken pipes.

Is there a MidTier/Tomcat or other setting that you have found addresses this 
problem?

Thanks.

Ken

Background:
Version 7.5 patch 3
MidTier - Linux, Tomcat JSP
ARS - Linux, Oracle 10g

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