[ckan-dev] CKAN CSW Harvest - GeoServer Error

Adrià Mercader adria.mercader at okfn.org
Mon Feb 8 10:41:44 UTC 2016


This looks like a mismatch between OWSLib (the library that parses the
rsults from the CSW server under the hood) and GeoServer.

I'm CCing Tom, one of OWSLib devs who maybe can shed more light into this.

Adrià

On 7 February 2016 at 15:49, Derek Hohls <dhohls at csir.co.za> wrote:
> We are trying to setup our GeoServer for harvesting by CKAN.
>
> The plug-in has been installed and all seems good.
>
> If I use Python and owslib.csw, then I am able to communicate and get
> results e.g.
>
>>>> from owslib.csw import CatalogueServiceWeb
> URL = 'http://localhost:8080/geoserver/csw'
>>>> csw = CatalogueServiceWeb(URL)
>>>> csw.getrecords2(maxrecords=20)
>>>> csw.results
> {'matches': 25, 'nextrecord': 21, 'returned': 20}
>>>> for rec in csw.records:
> ...     print csw.records[rec].title
> ...
> Tasmania water bodies
> Tasmania cities
> Tasmania state boundaries
> Tasmania roads
> USA Population
> World rectangle
>
> However, trying a harvest from CKAN results in "dc:" errors:
>
> 2016-02-07 15:37:49,325 DEBUG [ckanext.spatial.harvesters.csw.CSW.gather]
> Starting gathering for http://localhost:8080/geoserver/csw/
> 2016-02-07 15:37:49,325 INFO  [ckanext.spatial.lib.csw_client] Making CSW
> request: getrecords2 {'typenames': 'csw:Record', 'maxrecords': 10, 'sortby':
> <owslib.fes.SortBy object at 0x7f0c541551d0>, 'outputschema':
> 'http://www.isotc211.org/2005/gmd', 'cql': None, 'startposition': 0, 'esn':
> 'brief', 'constraints': []}
> 2016-02-07 15:37:50,403 ERROR [ckanext.spatial.harvesters.csw.CSW.gather]
> Exception: Traceback (most recent call last):
>   File
> "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/harvesters/csw.py",
> line 95, in gather_stage
>     for identifier in self.csw.getidentifiers(page=10,
> outputschema=self.output_schema(), cql=cql):
>   File
> "/usr/lib/ckan/default/src/ckanext-spatial/ckanext/spatial/lib/csw_client.py",
> line 127, in getidentifiers
>     csw.getrecords2(**kwa)
>   File
> "/usr/lib/ckan/default/local/lib/python2.7/site-packages/owslib/csw.py",
> line 341, in getrecords2
>     self._invoke()
>   File
> "/usr/lib/ckan/default/local/lib/python2.7/site-packages/owslib/csw.py",
> line 605, in _invoke
>     raise ows.ExceptionReport(self._exml, self.owscommon.namespace)
> ExceptionReport: 'Request failed due to: Sorting on dc:identifier/dc:value
> is not supported.\nSorting on dc:identifier/dc:value is not supported.'
> 2016-02-07 15:37:50,455 INFO  [ckanext.harvest.model] Error gathering the
> identifiers from the CSW server ['Request failed due to: Sorting on
> dc:identifier/dc:value is not supported.\nSorting on dc:identifier/dc:value
> is not supported.']
> 2016-02-07 15:37:50,462 ERROR [ckanext.harvest.queue] Gather stage failed
>
> Can anyone help with this (running GeoServer 2.8 and CKAN 2.5)
>
> Thanks
> Derek
>
>
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