On Sat, Aug 25, 2012 at 12:42 PM, Andrea Aime
<andrea.a...@geo-solutions.it>wrote:

> On Sat, Aug 25, 2012 at 11:06 AM, Andrea Aime <
> andrea.a...@geo-solutions.it> wrote:
>
>> Hi,
>> I was doing the usual "manual testing script" at
>> http://docs.geoserver.org/latest/en/developer/release-testing-checklist/index.html
>> and found a number of issues, some of which are serious:
>>
>> https://jira.codehaus.org/browse/GEOS-5283
>> https://jira.codehaus.org/browse/GEOS-5284
>> https://jira.codehaus.org/browse/GEOS-5285
>> https://jira.codehaus.org/browse/GEOS-5286
>>  https://jira.codehaus.org/browse/GEOS-5287
>>
>
> 5283 and 5286 fixed, 5285 happened to be a side effect of GEOS-5284.
> Looking into GEOS-5284 now, although I guess that would have to be solved
> at the GeoTools level to make sure all xsd based parser behave properly
>
>
Ok, got a grip on GEOS-5287 as well, it's partly due to my GE configuration
but still GeoServer's behavior is imho wrong (or at least GE does not like
it).

When buidilng a superoverlay GS always builds two to four network links
to the childs of the current tile, and it does so blindly, without checking
if
these requests will result in any data.

What happens when a superoverlay request comes in and finds no data to
paint? You get back a HTTP 204, which was used to communicate GWC
to stop seeding that area.

Unfortunately if GE is setup to report network errors it will handle that
204
as an error, and you'll get continuous popups telling you an error occurred.

Long story short, this has been there forever, I just happened to have GE
configured the right way to spot the problem (this setup is quite useful to
debug apps serving data to GE, otherwise you don't get to know what
happened, so while not being common in the general population it probably
is for whoever is developing apps serving data to GE).

What options do we have? I guess, develop yet another utility method telling
us if a certain tile has at least one feature inside, and generate the
network
link only in such case.
Going to look into this, should not be too hard.

Cheers
Andrea


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Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
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