I don't know how to help further. The error is from within Jena code,
and only a proper Java debugger or network monitor could find out where
it's failing, e.g. what the remote server response is.
Holger
On 2021-07-16 11:55 am, Rob Atkinson wrote:
That makes sense - but didnt work when I tried it :-(
Double checked it.
We can access the SPARQL endpoint from other locations via scripts, so
shouldnt be a more systemic access problem.
On Fri, 16 Jul 2021 at 09:17, Holger Knublauch <[email protected]
<mailto:[email protected]>> wrote:
Hi Rob,
sorry for the delay as I had to ask a colleague. We also suspect
it could simply be an authentication problem and the error is
choking on the response. For authentication against the remote
endpoint it will check the records available on the Password
Management page, and if there is any that exactly matches the
SERVICE URI, then that user name and password will be used with
basic auth for making the request. So I believe your first example
should work if you have a username/password for
https://example.org/edg/tbl/sparql
<https://example.org/edg/tbl/sparql> and then use the GRAPH
keyword. I doubt the second variation with the ? argument will work.
If you could give that a try?
Holger
On 2021-07-14 2:32 pm, [email protected]
<mailto:[email protected]> wrote:
I want to access live EDG content to download in a development
context. The export process gets out of hand if i have a bunch
of graphs to sync, and the trig backup is too coarse grained if
the live site has a lot of data, and neither allows me to control
a subset with a select statement...
SELECT *
WHERE
{ SERVICE <https:// example.org/edg/tbl/sparql>
<https://example.org/edg/tbl/sparql>
{
GRAPH <urn:x-evn-master:frogs_datagraph>
{?uc a :Frog }
}
}
SELECT *
WHERE
{ SERVICE
<https://example.org/edg/tbl/sparql/frogs_datagraph?with-imports=true>
<https://example.org/edg/tbl/sparql/frogs_datagraph?with-imports=true>
{?uc a :Frog }
}
Got this result..
Failed to execute SPARQL request:
org.apache.jena.sparql.resultset.ResultSetException: Failed when
initializing the StAX parsing engine
but if i access the local server
<http://localhost:8083/tbl/sparql> <http://localhost:8083/tbl/sparql>
it works
So i presume its possibly related to permissions - and just a bad
error message?
If so, how can one set user permissions when accessing a remote
endpoint?
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