Hello
I've upgraded to Jena 3.1.0 and some of my SPARQL queries now crash with
NullPointerException. The simplest query that causes a crash looks like
this:
SELECT ?s
WHERE {
?s ?p ?o .
?s <http://www.w3.org/2000/01/rdf-schema#member> ?m .
FILTER (!bound(?test))
}
Here's the stack trace:
java.lang.NullPointerException
at
org.apache.jena.sparql.algebra.optimize.TransformFilterPlacement.placePropertyFunctionProcedure(TransformFilterPlacement.java:453)
at
org.apache.jena.sparql.algebra.optimize.TransformFilterPlacement.placePropertyFunction(TransformFilterPlacement.java:432)
at
org.apache.jena.sparql.algebra.optimize.TransformFilterPlacement.transform(TransformFilterPlacement.java:200)
at
org.apache.jena.sparql.algebra.optimize.TransformFilterPlacement.transform(TransformFilterPlacement.java:159)
at
org.apache.jena.sparql.algebra.TransformWrapper.transform(TransformWrapper.java:59)
at org.apache.jena.sparql.algebra.op.OpFilter.apply(OpFilter.java:100)
at
org.apache.jena.sparql.algebra.Transformer$ApplyTransformVisitor.visitFilter(Transformer.java:401)
at
org.apache.jena.sparql.algebra.OpVisitorByType.visit(OpVisitorByType.java:110)
at org.apache.jena.sparql.algebra.op.OpFilter.visit(OpFilter.java:103)
at
org.apache.jena.sparql.algebra.OpWalker$WalkerVisitor.visit1(OpWalker.java:85)
at
org.apache.jena.sparql.algebra.OpWalker$WalkerVisitor.visitFilter(OpWalker.java:91)
at
org.apache.jena.sparql.algebra.OpVisitorByType.visit(OpVisitorByType.java:110)
at org.apache.jena.sparql.algebra.op.OpFilter.visit(OpFilter.java:103)
at
org.apache.jena.sparql.algebra.OpWalker$WalkerVisitor.visit1(OpWalker.java:83)
at
org.apache.jena.sparql.algebra.OpVisitorByType.visitModifer(OpVisitorByType.java:42)
at
org.apache.jena.sparql.algebra.OpVisitorByType.visit(OpVisitorByType.java:158)
at org.apache.jena.sparql.algebra.op.OpProject.visit(OpProject.java:47)
at org.apache.jena.sparql.algebra.OpWalker.walk(OpWalker.java:43)
at org.apache.jena.sparql.algebra.OpWalker.walk(OpWalker.java:38)
at
org.apache.jena.sparql.algebra.Transformer.applyTransformation(Transformer.java:147)
at
org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:140)
at
org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:129)
at
org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:123)
at
org.apache.jena.sparql.algebra.Transformer.transform(Transformer.java:56)
at
org.apache.jena.sparql.algebra.Transformer.transformSkipService(Transformer.java:86)
at
org.apache.jena.sparql.algebra.Transformer.transformSkipService(Transformer.java:68)
at
org.apache.jena.sparql.algebra.optimize.Optimize.apply(Optimize.java:282)
at
org.apache.jena.sparql.algebra.optimize.Optimize.rewrite(Optimize.java:225)
at
org.apache.jena.sparql.algebra.optimize.Optimize.optimize(Optimize.java:78)
at org.apache.jena.sparql.algebra.Algebra.optimize(Algebra.java:65)
at
org.apache.jena.sparql.engine.main.QueryEngineMain.modifyOp(QueryEngineMain.java:67)
at
org.apache.jena.tdb.solver.QueryEngineTDB.modifyOp(QueryEngineTDB.java:88)
at
org.apache.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBase.java:101)
at
org.apache.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.java:87)
at
org.apache.jena.tdb.solver.QueryEngineTDB$QueryEngineFactoryTDB.create(QueryEngineTDB.java:169)
at
org.apache.jena.sparql.engine.QueryEngineFactoryWrapper.create(QueryEngineFactoryWrapper.java:50)
at
org.apache.jena.sparql.engine.QueryExecutionBase.getPlan(QueryExecutionBase.java:524)
at
org.apache.jena.sparql.engine.QueryExecutionBase.startQueryIterator(QueryExecutionBase.java:472)
at
org.apache.jena.sparql.engine.QueryExecutionBase.execResultSet(QueryExecutionBase.java:511)
at
org.apache.jena.sparql.engine.QueryExecutionBase.execSelect(QueryExecutionBase.java:172)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.executeQuery(SPARQL_Query.java:314)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.execute(SPARQL_Query.java:270)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.executeWithParameter(SPARQL_Query.java:228)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.perform(SPARQL_Query.java:213)
at
org.apache.jena.fuseki.servlets.ActionSPARQL.executeLifecycle(ActionSPARQL.java:134)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.executeRequest(SPARQL_UberServlet.java:354)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.serviceDispatch(SPARQL_UberServlet.java:315)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.executeAction(SPARQL_UberServlet.java:271)
at
org.apache.jena.fuseki.servlets.ActionSPARQL.execCommonWorker(ActionSPARQL.java:85)
at
org.apache.jena.fuseki.servlets.ActionBase.doCommon(ActionBase.java:81)
at
org.apache.jena.fuseki.servlets.FusekiFilter.doFilter(FusekiFilter.java:72)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
at
org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
at
org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at
org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
at
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
at
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.apache.jena.fuseki.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:285)
at
org.apache.jena.fuseki.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:248)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1156)
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1088)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
at org.eclipse.jetty.server.Server.handle(Server.java:517)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:306)
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
at
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:245)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at
org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
at
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
at
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
at java.lang.Thread.run(Thread.java:745)
I will appreciate any help. Maybe this is a regression or on the
contrary something is wrong with the query and Jena works correctly now.
Best regards,
Alex Shkop
