[GeoNode-users] Issues with mosaics in GeoNode

Paolo Pasquali paolo.pasquali at gmail.com
Mon Jun 15 09:08:39 PDT 2020

Ciao Alessio,

Thanks for your help. I've solved the issue. Probably I've messed up gdal
(a long story...). WIth a fresh installation everything is fine. Anyway,
I've used the datastore.properties file as suggested and it works
pretty well.

About the cache. I believe the _invalidate_geowebcache_layer method is
called not only when the style is updated (which is fine) but probably
every time the metadata is updated (which can cause some headache if you
work with large datasets).


On Wed, May 20, 2020 at 9:59 AM Alessio Fabiani <
alessio.fabiani at geo-solutions.it> wrote:

> Hi Paolo,
> so you are using GeoNode 2.10.3 and GeoServer 2.15.4 I guess, is that
> correct?
> First of all, as soon as possible update GeoServer with the same version
> WAR here
> <https://build.geo-solutions.it/geonode/geoserver/latest/geoserver-2.15.4.war>,
> The WARs have been rebuilt recently with some updates of GeoServer
> community plugins.
> Secondly, are you trying to create the mosaic by using the shapefile
> index? Try to create the "datastore.properties" and let GeoServer create
> the index on the DB instead.
> I recently configured a mosaic with more than 120K granules and it worked
> seamlessly.
> A warning here. When you create the store, the first time, GeoServer will
> remain blocked for a long time, until he finished scanning all the
> granules. Even if you have some strange page back on the gui or some odd
> behavior, don't worry about it.
> Finally, there's a method on GeoNode "_invalidate_geowebcache_layer" which
> is called when you create a Layer and mostly when you update the style.
> Currently, the behavior is trivial, he just invokes the method every time
> you update the style. It probably could be improved.
> Il giorno ven 15 mag 2020 alle ore 16:56 Paolo Pasquali <
> paolo.pasquali at gmail.com> ha scritto:
>> Dear all,
>> I'm trying to publish two mosaics of about 3500 tiles each in GeoNode.
>> Firstly, I've created the shp index and the tile cache on a stand alone
>> GeoServer installation without any problem.
>> Then I've moved the mosaic tiles and all the cache on a GeoNode 2.10.3
>> that I've installed following this documentation:
>> https://docs.geonode.org/en/2.10/install/core/index.html#ubuntu-18-04
>> 1) The first issue I have encountered is that for both mosaics I get a
>> "Too many open files" error from GeoServer. I've both tried to use the old
>> shp index and to generate a new one with the GeoNode GeoServer but I always
>> get this error.
>> I've also disabled the JAI ImageRead (deferred loading) but nothing
>> improved.
>> I'm wondering why there is a different behaviour between the two
>> GeoServers. Maybe I've messed up some gdal library? The gdal version is
>> 2.2.3 on Ubuntu 18.04
>> 2) The second issue is the Metadata update via GeoNode. I've used
>> updatelayers to import the mosaics in GeoNode and then I have used the
>> wizard to update the metadata. By updating the metadata, all the tile cache
>> has been flushed. Is this the expected behaviour? I understand for small
>> rasters may be convenient but in other cases it may not. Is there a way to
>> set whether the wizard can flush the cache when updating the metadata?
>> Thanks in advance for your help.
>> Best,
>> Paolo
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>> geonode-users at lists.osgeo.org
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> --
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