Hi Martin,

This error comes up when you have modified the Geoserver Catalog
configuration but GWC configuration is not aware of the changes. For
example, you deleted a layer from Geoserver catalog but the layer reference
was not removed from gwc-layers.

Solution: 1. You'll need access to *geoserver_data_dir/gwc-layers*
directory and delete this layer LayerInfoImpl--2c3fc31e:159ff9b77e2:-7f6a.

2. Now that you don't have directory access, You'll need to reload
Geoserver Configuration which may force reload GWC Configuration. Hope it
helps.

Kind regards,
Steve Omondi

On Tue, May 8, 2018 at 8:15 PM, Martin Davis <mtncl...@gmail.com> wrote:

> We get the following error message when invoking the Tile Caching / Tile
> Layers panel in the web UI:
>
> Caused by: java.lang.IllegalStateException: Could not locate a layer or
> layer group with id LayerInfoImpl--2c3fc31e:159ff9b77e2:-7f6a within
> GeoServer configuration, the GWC configuration seems to be out of synch
>
> Is there any way to fix this?  Perhaps by deleting objects from the data
> directory?  Even better would be a way to fix it from the Web UI itself,
> since we don't have easy access to the server.
>
> There are previous reports of the same issue [1][2].  Seems like a
> candidate for some more gracefully failure handling..
>
>
> [1] https://osgeo-org.atlassian.net/browse/GEOS-7202
> [2] https://sourceforge.net/p/geoserver/mailman/message/34484893/
>
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Please make sure you read the following two resources before posting to this 
list:
- Earning your support instead of buying it, but Ian Turton: 
http://www.ianturton.com/talks/foss4g.html#/
- The GeoServer user list posting guidelines: 
http://geoserver.org/comm/userlist-guidelines.html

If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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