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From הילה <hilavalen...@gmail.com>
Subject Re: Application crash after Migrate to different ESX
Date Mon, 06 Jun 2011 20:35:25 GMT
Hey,
I use Tomcat's JDBC pool (tomcat-jdbc.jar)
sorry, I haven't quite understood why shouldn't I use the
ValidationInterval="30000" (30 seconds) string on my configuration..
On tomcat's documentation, it says that testonborrow=true and
validationQuery=SELECT 1 were part of the DBCP , and the
ValidationInterval=30000 is introduced in the Tomcat's JDBC pool.

Thanks
Hils


2011/6/6 Christopher Schultz <chris@christopherschultz.net>

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> הילה,
>
> On 6/6/2011 9:56 AM, הילה wrote:
> > I've set testonborrow, validationquery and validationinterval - and it
> did
> > the trick. After ESX migration or just disconnect and reconnect of the
> > network card, the application recovers by itself.
>
> Note that "validationInterval" is not a valid configuration option (if
> you're talking about DBCP... sorry, I can't keep track of your
> configuration... are you using DBCP or Tomcat's new, semi-experimental
> pool?).
>
> If you're using DBCP, you should really read this page in it's entirety:
>
> http://commons.apache.org/dbcp/configuration.html
>
> If you are using Tomcat's pool, you should read the documentation that
> comes with it.
>
> Any type of "interval" setting is likely to create a background thread
> that monitors the connections and tests them periodically.
>
> Unless you have a very strict response-time metric that you are trying
> to hit, I would stick with testOnBorrow="true" (along with an innocuous
> validationQuery) and leave everything else alone.
>
> - -chris
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