I'm running a query using the engines end-point. Eventually I get a failure with an exception [1] in the logs, whose underlying cause seems to be: *Server returned HTTP response code: 500 for URL*: http://dbpedia.org/sparql?query=SELECT+DISTINCT+?id+%0AWHERE+%7B+%0A++%7B+%0A++++?id+%3Chttp://www.w3.org/1999/02/22-rdf-syntax-ns%23type%3E+%3Chttp://dbpedia.org/ontology/Organisation%3E+.+%0A++++?id+%3Chttp://www.w3.org/2000/01/rdf-schema%23label%3E+?tmp1+.+%0A++++++?tmp1+bif:contains+'%22News%22+AND+%22of%22+AND+%22the%22+AND+%22World%22'+.+%0A%7D+%0A%7D+%0AORDER+BY+DESC+(+%3CLONG::IRI_RANK%3E+(?id)+)+%0ALIMIT+20+%0A&format=application/sparql-results%2Bjson
But if I copy and paste the URL and run it with curl, I don't get 500. How is that possible? *$ curl -i " http://dbpedia.org/sparql?query=SELECT+DISTINCT+?id+%0AWHERE+%7B+%0A++%7B+%0A++++?id+%3Chttp://www.w3.org/1999/02/22-rdf-syntax-ns%23type%3E+%3Chttp://dbpedia.org/ontology/Person%3E+.+%0A++++?id+%3Chttp://www.w3.org/2000/01/rdf-schema%23label%3E+?tmp1+.+%0A++++++?tmp1+bif:contains+'%22James%22'+.+%0A%7D+%0A%7D+%0AORDER+BY+DESC+(+%3CLONG::IRI_RANK%3E+(?id)+)+%0ALIMIT+20+%0A&format=application/sparql-results%2Bjson "* HTTP/1.1 200 OK Date: Wed, 20 Jul 2011 11:04:06 GMT Content-Type: application/sparql-results+json; charset=UTF-8 Connection: keep-alive Server: Virtuoso/06.02.3130 (Linux) x86_64-generic-linux-glibc25-64 VDB Content-Length: 1830 Accept-Ranges: bytes { "head": { "link": [], "vars": ["id"] }, "results": { "distinct": false, "ordered": true, "bindings": [ { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Stroud"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Brown"; }}, { "id": { "type": "uri", "value": "http://dbpedia.org/resource/Will.i.am"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Horner"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Mason"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Newton_Howard"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_L._Brooks"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Garner"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/Aphex_Twin"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Woods"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Hetfield"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Earl_Jones"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Cagney"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Taylor"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Coburn"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/Henry_James"; }}, { "id": { "type": "uri", "value": "http://dbpedia.org/resource/Sid_James"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/Rick_James"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_William_Guercio"; }}, { "id": { "type": "uri", "value": " http://dbpedia.org/resource/James_Whitney_Young"; }} ] } } [1] exception in the logs: 20.07.2011 14:03:35.577 *WARN* [357586160@qtp-884010469-9] org.apache.felix.http.jetty /engines/ (org.apache.stanbol.enhancer.servicesapi.EngineException: 'NamedEntityTaggingEngine' failed to process content item 'urn:content-item-sha1-3a8f438232649baccc348accde345453f0cd7d27' with type 'text/plain': org.apache.stanbol.entityhub.servicesapi.site.ReferencedSiteException: Unable to execute query on remote site http://dbpedia.org/sparql with entitySearcher org.apache.stanbol.entityhub.searcher.VirtuosoSearcher!) org.apache.stanbol.enhancer.servicesapi.EngineException: 'NamedEntityTaggingEngine' failed to process content item 'urn:content-item-sha1-3a8f438232649baccc348accde345453f0cd7d27' with type 'text/plain': org.apache.stanbol.entityhub.servicesapi.site.ReferencedSiteException: Unable to execute query on remote site http://dbpedia.org/sparql with entitySearcher org.apache.stanbol.entityhub.searcher.VirtuosoSearcher! at org.apache.stanbol.enhancer.engines.entitytagging.impl.NamedEntityTaggingEngine.computeEnhancements(NamedEntityTaggingEngine.java:323) at org.apache.stanbol.enhancer.jobmanager.impl.InMemoryJobManager.enhanceContent(InMemoryJobManager.java:62) at org.apache.stanbol.enhancer.jersey.resource.EnginesRootResource.enhanceAndBuildResponse(EnginesRootResource.java:163) at org.apache.stanbol.enhancer.jersey.resource.EnginesRootResource.enhanceFromForm(EnginesRootResource.java:127) (...) Caused by: org.apache.stanbol.entityhub.servicesapi.site.ReferencedSiteException: Unable to execute query on remote site http://dbpedia.org/sparql with entitySearcher org.apache.stanbol.entityhub.searcher.VirtuosoSearcher! at org.apache.stanbol.entityhub.core.impl.ReferencedSiteImpl.findEntities(ReferencedSiteImpl.java:318) at org.apache.stanbol.enhancer.engines.entitytagging.impl.NamedEntityTaggingEngine.computeEntityRecommentations(NamedEntityTaggingEngine.java:408) at org.apache.stanbol.enhancer.engines.entitytagging.impl.NamedEntityTaggingEngine.computeEnhancements(NamedEntityTaggingEngine.java:320) ... 44 more Caused by: java.io.IOException: Server returned HTTP response code: 500 for URL: http://dbpedia.org/sparql?query=SELECT+DISTINCT+?id+%0AWHERE+%7B+%0A++%7B+%0A++++?id+%3Chttp://www.w3.org/1999/02/22-rdf-syntax-ns%23type%3E+%3Chttp://dbpedia.org/ontology/Organisation%3E+.+%0A++++?id+%3Chttp://www.w3.org/2000/01/rdf-schema%23label%3E+?tmp1+.+%0A++++++?tmp1+bif:contains+'%22News%22+AND+%22of%22+AND+%22the%22+AND+%22World%22'+.+%0A%7D+%0A%7D+%0AORDER+BY+DESC+(+%3CLONG::IRI_RANK%3E+(?id)+)+%0ALIMIT+20+%0A&format=application/sparql-results%2Bjson at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1436) at org.apache.stanbol.entityhub.site.linkeddata.impl.SparqlEndpointUtils.sendSparqlRequest(SparqlEndpointUtils.java:49) at org.apache.stanbol.entityhub.site.linkeddata.impl.VirtuosoSearcher.findEntities(VirtuosoSearcher.java:90) at org.apache.stanbol.entityhub.core.impl.ReferencedSiteImpl.findEntities(ReferencedSiteImpl.java:316) ... 46 more -- David Riccitelli Interact SpA Via A. Bargoni 78 (scala F) 00153 Roma T +39 06 58318 301 F +39 06 58318 303
