Hey, one of Graphity users has configured it with Sesame SPARQL endpoint, but he gets an NPE in ARQ code:
11:15:54,198 DEBUG DataManager:98 - Remote service http://localhost:8080/openrdf-workbench/repositories/odn/query Query: DESCRIBE ?instance <http://192.168.122.30:8080/graphity-browser/> WHERE { { SELECT ?instance WHERE { ?instance <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdfs.org/ns/void#Dataset> } OFFSET 0 LIMIT 20 } } 11:15:54,252 DEBUG DataManager:140 - Remote query execution exception: {} java.lang.NullPointerException at com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execModel(QueryEngineHTTP.java:281) at com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:258) at com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execDescribe(QueryEngineHTTP.java:255) at org.graphity.server.util.DataManager.loadModel(DataManager.java:134) at org.graphity.server.util.DataManager.loadModel(DataManager.java:161) at org.graphity.server.model.SPARQLEndpointBase.loadModel(SPARQLEndpointBase.java:324) The dependency is on ARQ 2.9.2, and I found the code in question: http://grepcode.com/file/repo1.maven.org/maven2/org.apache.jena/jena-arq/2.9.2/com/hp/hpl/jena/sparql/engine/http/QueryEngineHTTP.java?av=f#281 What could go wrong there? Is it possible that the "lang" variable somehow becomes null? Martynas graphityhq.com
