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From Gary Gregory <>
Subject Re: [DBCP] Connection just obtained from datasource is invalid
Date Tue, 09 Jan 2018 15:31:10 GMT
Currious: are you using the current versions of DBCP and Pool?


On Jan 9, 2018 8:28 AM, "Shawn Heisey" <> wrote:

> On 1/8/2018 11:19 PM, Chas Honton wrote:
> > Don’t forget about any proxies or routers between the client and the
> server. Most infrastructure components will close quiescent connections
> (within minutes)
> There are no proxies for the MySQL traffic.  The machines involved are
> on the same subnet (vlan), so it's only layer 2 switches made by Cisco
> that provide the networking -- no routing.  There is no QoS configured.
> The connections are gigabit and the switchports are not incrementing
> error counters.  The inter-switch connections are trunk ports and also
> show no incrementing error counters.
> Cisco switches tend to have enough backplane bandwidth to run every port
> at full line rate in both directions.  We don't run our infrastructure
> anywhere near full switching capacity, so dropped packets are unlikely,
> but even if that did happen, TCP is designed to handle that
> transparently to applications.
> Cisco routers and switches do not typically interfere in TCP
> communication.  Their firewalls do get involved in TCP, but even if this
> traffic was passing through our firewall (which it's not), our TCP idle
> timeout on the firewall is set to two hours, to accommodate long-lived
> TCP connections over the Internet.
> Thanks,
> Shawn
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