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From "Cohen, Laurence" <lco...@novetta.com>
Subject Re: Help with Tomcat Applications not listening
Date Wed, 02 Sep 2015 20:53:44 GMT
Thank you Chris,

We only have one webserver and two tomcat applications on the back end.
Where do I set the connections allowed if we are using mod_proxy_httpd?

Thanks,

Larry Cohen

On Wed, Sep 2, 2015 at 4:47 PM, Christopher Schultz <
chris@christopherschultz.net> wrote:

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>
> Larry,
>
> On 9/2/15 3:54 PM, Cohen, Laurence wrote:
> > We have a webserver and an appserver, and the webserver talks to
> > the appserver on port 8007.  Every once the communication will
> > stop, and we will notice an error on the webserver saying that it
> > can't talk to the appserver.  When this happens, I will run a
> > netstat -an |grep 8007 on the appserver, and there are hundreds of
> > connections to that port.  When I restart the app, it will be back
> > to about 10 connections, and they will start growing again.
> >
> > I'm trying to figure out why they are growing so quickly, and why
> > they aren't dying when the connection is no longer needed.
>
> My guess is that the number of connections coming from httpd and the
> number of connections allowed to Tomcat don't match up.
>
> How many web servers? How many back-end Tomcats? Which connector are
> you using?
>
> If w = # of httpd instances
>    c = # of total httpd threads
> then you need w * c connections allowed in all of your Tomcats (see
> <Connector> attribute maxConnections.
>
> Another possibility is that the connection timeouts on httpd (mod_jk
> connect_timeout, in ms) versus Tomcat (<Connector> connectionTimeout,
> in ms) are not the same.
>
> - -chris
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-- 

[image: www.novetta.com]

Larry Cohen

System Administrator


12021 Sunset Hills Road, Suite 400

Reston, VA 20190

Email  lcohen@novetta.com

Office  703-885-1064

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