[Zoo-discuss] BufferPy problem

Tue Dec 25 13:34:25 PST 2012

Hi Gérald,

first I want to wish you a merry Christmas.
Thank you for your response.

For this test I used zoo-kernel from 2012-12-18 without any further
developments.
The response time on the client side for calculating seven buffers for
the topp:tasmania_water_bodies layer from http://demo.opengeo.org
takes about three seconds via HSDPA without caching. There is no
timeout variable set in the httpd.conf file during OSGeo4W
installation. The standard apache timeout is five minutes. The
response time for calculating 49 buffers for the topp:states layer
from the same server should take less than five minutes. What do you
mean?

Even after I've set the timeout variable to 3600 [seconds] (60
minutes) I got no response.

When the tiemout was reached (after 5 or 60 minutes) I got the
following error message in the OSGeo4W apache log file:
"Script timed out before returning headers: zoo_loader.cgi".
I think the problem is not the server timeout.

Thank you for your occasional support.

Regards,
Farkas

On Dec 23, 2012 12:01 PM, "Gérald Fenoy" <gerald.fenoy at geolabs.fr> wrote:
>
> Hi Farkas,
> I guess that the issue doesn't come from the ZOO-Kernel itself but from the configuration of your web server which return a timeout.
>
> It should simply mean that the web server consider that the ZOO-Kernel took too much time to handle the request. Which may be the case when you are using huge dataset. You should take a look into your web server configuration to fix this issue.
>
> Hope you can confirm that the issue can be solved by setting longer timeout limit in your webserver configuration.
> Best regards,
>
> Gérald Fenoy
> gerald.fenoy at geolabs.fr
>
> Le 20 déc. 2012 à 21:52, Farkas H <farkas.dus at gmail.com> a écrit :
>
> > Hi everyone,
> >
> > this http-Post buffer request [1] (BufferPy, buffers around features
> > from layer topp:tasmania_water_bodies, 7 features) works.
> > If I change the layer to topp:states (49 features) the request doesn't
> > work [2]. You find the error message here [3].
> > If I buffer just one feature from the states layer the request works
> > [4]. Every single feature works.
> >
> > I've noticed this behavior in other layers. One feature works the
> > whole layer doesn't work.
> > It looks like that the request from a certain number of objects does
> > not work anymore.
> >
> > What's wrong?
> >
> > I appreciate any advice.
> >
> > Regards,
> > Farkas
> >
> > [1]
> > <wps:Execute service="WPS" version="1.0.0"
> > xmlns:wps="http://www.opengis.net/wps/1.0.0"
> > xmlns:ows="http://www.opengis.net/ows/1.1"
> > xmlns:xlink="http://www.w3.org/1999/xlink"
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> > xsi:schemaLocation="http://www.opengis.net/wps/1.0.0
> > http://schemas.opengis.net/wps/1.0.0/wpsExecute_request.xsd">
> > <ows:Identifier>BufferPy</ows:Identifier>
> > <wps:DataInputs>
> > <wps:Input>
> > <ows:Identifier>InputPolygon</ows:Identifier>
> > <ows:Title>water bodies</ows:Title>
> > <wps:Reference xlink:href="http://demo.opengeo.org/geoserver/ows?Request=GetFeature&Service=WFS&Version=1.0.0&Typename=topp:tasmania_water_bodies"/>
> > </wps:Input>
> > <wps:Input>
> > <ows:Identifier>BufferDistance</ows:Identifier>
> > <ows:Title>Emergency area.</ows:Title>
> > <wps:Data>
> > <wps:LiteralData>0.01</wps:LiteralData>
> > </wps:Data>
> > </wps:Input>
> > </wps:DataInputs>
> > <wps:ResponseForm>
> > <wps:ResponseDocument storeExecuteResponse="false">
> > <wps:Output asReference="true">
> > <ows:Identifier>Result</ows:Identifier>
> > </wps:Output>
> > </wps:ResponseDocument>
> > </wps:ResponseForm>
> > </wps:Execute>
> >
> > [2]
> > ...
> > <wps:Reference xlink:href="http:...;Typename=topp:states"/>
> > ...
> >
> > [3]
> > <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
> > <html><head>
> > <title>504 Gateway Time-out</title>
> > </head><body>
> > <h1>Gateway Time-out</h1>
> > <p>The gateway did not receive a timely response
> > from the upstream server or application.</p>
> > </body></html>
> >
> > [4]
> > ...
> > <wps:Reference xlink:href="http:...;Typename=topp:states&FeatureID=states.1"/>
> > ...
> > _______________________________________________
> > Zoo-discuss mailing list
> > Zoo-discuss at lists.osgeo.org
> > http://lists.osgeo.org/cgi-bin/mailman/listinfo/zoo-discuss
>