High cpu on Apache 2.2.3/Tomcat 5.5.20/APJ1.3 - Windows Server 2003 R2 SP1 SE

[Mirko Viviani <mv...@gmail.com>]

Hi,

We are using Tomcat 5.5.20 with Apache 2.2.3/ssl/svn and jdk 1.6.0-b105 on a
Windows Server 2003 R2/SP1 SE with 4 Xeon cores and 4GB ram.

I have configured apache with a virtual host and the ProxyPass directive to
redirect all the requests to the Tomcat instance, as in this example:

<VirtualHost 192.168.1.22:80 <http://192.168.1.22/>>
    ServerName test.ourdomain
    ServerAdmin mymail

    ErrorLog logs/test-error.log
    CustomLog logs/test-access.log common

    <Location />
       ProxyPass ajp://test.localhost:8009/
    </Location>
</VirtualHost>

The same binaries and configurations work like a charm on a Win 2000 Pro/SP4
single processor test machine, with the only difference that the virtual
host is bound to * instead to a real ip address.

On the Win2003 server, after the first requests, the tomcat5 process starts
eating 100% cpu on one core and saturate all the cpus after some requests.

After that the APJ13 link starts loosing bytes requiring a service restart.
An Apache restart releases the resources of the tomcat5 process.

Using a Redirect directive to the tomcat 8080 port instead of a ProxyPass
work correctly but it isn't the desired solution.

There are not antivirus or firewall/packet filter on the machines.

Any hints?
Thank you.

Mirko

Re: High cpu on Apache 2.2.3/Tomcat 5.5.20/APJ1.3 - Windows Server 2003 R2 SP1 SE

[Mirko Viviani <mv...@gmail.com>]

On 4/5/07, Filip Hanik - Dev Lists <de...@hanik.com> wrote:

if you are already using mod_proxy, why use AJP, mod_proxy in
> particular, has a more solid implementation in HTTP than AJP


I wasn't aware of the problems of the AJP implementation.
With mod_proxy and without the html base tag it works.

Thank you!

Ciao
Mirko

Re: High cpu on Apache 2.2.3/Tomcat 5.5.20/APJ1.3 - Windows Server 2003 R2 SP1 SE

[Filip Hanik - Dev Lists <de...@hanik.com>]

if you are already using mod_proxy, why use AJP, mod_proxy in 
particular, has a more solid implementation in HTTP than AJP

Filip

Mirko Viviani wrote:
> Hi,
>
> We are using Tomcat 5.5.20 with Apache 2.2.3/ssl/svn and jdk 
> 1.6.0-b105 on a
> Windows Server 2003 R2/SP1 SE with 4 Xeon cores and 4GB ram.
>
> I have configured apache with a virtual host and the ProxyPass 
> directive to
> redirect all the requests to the Tomcat instance, as in this example:
>
> <VirtualHost 192.168.1.22:80 <http://192.168.1.22/>>
>    ServerName test.ourdomain
>    ServerAdmin mymail
>
>    ErrorLog logs/test-error.log
>    CustomLog logs/test-access.log common
>
>    <Location />
>       ProxyPass ajp://test.localhost:8009/
>    </Location>
> </VirtualHost>
>
> The same binaries and configurations work like a charm on a Win 2000 
> Pro/SP4
> single processor test machine, with the only difference that the virtual
> host is bound to * instead to a real ip address.
>
> On the Win2003 server, after the first requests, the tomcat5 process 
> starts
> eating 100% cpu on one core and saturate all the cpus after some 
> requests.
>
> After that the APJ13 link starts loosing bytes requiring a service 
> restart.
> An Apache restart releases the resources of the tomcat5 process.
>
> Using a Redirect directive to the tomcat 8080 port instead of a ProxyPass
> work correctly but it isn't the desired solution.
>
> There are not antivirus or firewall/packet filter on the machines.
>
> Any hints?
> Thank you.
>
> Mirko
>
> ------------------------------------------------------------------------
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.446 / Virus Database: 268.18.25/745 - Release Date: 4/3/2007 12:48 PM
>   


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