Hi Daniel, > I'm executing the following SPARQL query in JAVA... > > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > SELECT ?s ?sl ?p ?o ?ol ?range ?domain > WHERE { > ?s rdf:type <http://dbpedia.org/ontology/Person> . > ?s rdfs:label ?sl . > ?s ?p ?o . > ?o rdfs:label ?ol . > FILTER ( langMatches( lang(?sl), "de" ) && langMatches( lang(? > ol), "de" ) ) > ?p rdfs:range ?range . > ?p rdfs:domain ?domain . } > LIMIT 10000 // tried different LIMITs ranging from 1000 - 100.000 > OFFSET 0 > > ... like this: > > QueryEngineHTTP qexec = new QueryEngineHTTP(SPARQL_ENDPOINT_URI, > query); > qexec.addDefaultGraph(DBPEDIA_DEFAULT_GRAPH); > > But I get, regardless of the endpoint I'm choosing, http://dbpedia.org/sparql > or http://live.dbpedia.org/sparql, only this error message. What is > this error? Is there a way to avoid it? > > Exception in thread "main" HttpException: HttpException: 502 Proxy > Error: HttpException: 502 Proxy Error > at > com > .hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java: > 340) > at > com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java: > 190) > at com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java: > 147) > at > com > .hp > .hpl > .jena > .sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java: > 117) > at > de > .uni_leipzig > .simba > .boa > .backend > .configuration > .command > .impl > .WriteRelationToFileCommand > .getKnowledge(WriteRelationToFileCommand.java:208) > at > de > .uni_leipzig > .simba > .boa > .backend > .configuration > .command > .impl > .WriteRelationToFileCommand.execute(WriteRelationToFileCommand.java: > 49) > at > de > .uni_leipzig > .simba > .boa > .backend > .configuration > .command > .impl > .WriteRelationToFileCommand.main(WriteRelationToFileCommand.java:38) > Caused by: HttpException: 502 Proxy Error > at > com > .hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java: > 301) > ... 6 more
There was a setting on dbpedia.org which was too small for some header responses leading to a 502 error which may have caused your original problem. This setting has now been fixed. However when i run your query against the http://dbpedia.org/sparql endpoint i am now getting: Virtuoso 42000 Error The estimated execution time 3212 (sec) exceeds the limit of 1500 (sec). Please check if you can simplify your query or use an alternative endpoint like our http://lod.openlinksw.com/sparql which has the same data. Patrick --- OpenLink Software ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Dbpedia-discussion mailing list Dbpedia-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
