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Blazegraph High Performance Graph Database
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Error with SPARQL-star #164

Open pchampin opened 4 years ago

pchampin commented 4 years ago

I'm using Blazegraph 2.1.6. Steps to reproduce the problem:

thompsonbry commented 4 years ago

Can you get the explain of the plan?

In general, a not materialized exception means that the plan is trying to use the lexical form of some variable binding, but it has not yet resolved that lexical form from the dictionary.

As a guess, it is failing to resolve the statement identifier for << ?s ?p ?o >> to the corresponding fully materialized statement.

As to why, my first guess would be that somehow the namespace was not setup correctly.

One thing that might be useful is to extend the RDR tests for this case and then run those specific tests and see what happens.

Bryan

On Thu, May 28, 2020 at 03:18 Pierre-Antoine Champin < notifications@github.com> wrote:

I'm using Blazegraph 2.1.6. Steps to reproduce the problem:

  • create a namespace with the rdr mode, and use this namespace;
  • update with the following query:

PREFIX : INSERT DATA { :superman :can :fly . :lois :knows << :superman :can :fly >> . }

  • then run the following query:

PREFIX : SELECT * { :lois :knows << ?s ?p ?o >>. }

  • I get the following error:

ERROR: SPARQL-QUERY: queryStr=PREFIX : SELECT * { :lois :knows << ?s ?p ?o >>. } java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: org.openrdf.query.QueryEvaluationException: com.bigdata.rdf.internal.NotMaterializedException: Sid(TermId(5U)[tag:superman]:TermId(1U)[tag:can]:TermId(2U)[tag:fly]) at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at com.bigdata.rdf.sail.webapp.BigdataServlet.submitApiTask(BigdataServlet.java:294) at com.bigdata.rdf.sail.webapp.QueryServlet.doSparqlQuery(QueryServlet.java:678) at com.bigdata.rdf.sail.webapp.QueryServlet.doPost(QueryServlet.java:275) at com.bigdata.rdf.sail.webapp.RESTServlet.doPost(RESTServlet.java:269) at com.bigdata.rdf.sail.webapp.MultiTenancyServlet.doPost(MultiTenancyServlet.java:195) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1340) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1242) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:503) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.util.concurrent.ExecutionException: org.openrdf.query.QueryEvaluationException: com.bigdata.rdf.internal.NotMaterializedException: Sid(TermId(5U)[tag:superman]:TermId(1U)[tag:can]:TermId(2U)[tag:fly]) at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191) at com.bigdata.rdf.sail.webapp.QueryServlet$SparqlQueryTask.call(QueryServlet.java:889) at com.bigdata.rdf.sail.webapp.QueryServlet$SparqlQueryTask.call(QueryServlet.java:695) at com.bigdata.rdf.task.ApiTaskForIndexManager.call(ApiTaskForIndexManager.java:68) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ... 1 more Caused by: org.openrdf.query.QueryEvaluationException: com.bigdata.rdf.internal.NotMaterializedException: Sid(TermId(5U)[tag:superman]:TermId(1U)[tag:can]:TermId(2U)[tag:fly]) at com.bigdata.rdf.sail.Bigdata2Sesame2BindingSetIterator.hasNext(Bigdata2Sesame2BindingSetIterator.java:188) at info.aduna.iteration.IterationWrapper.hasNext(IterationWrapper.java:68) at org.openrdf.query.QueryResults.report(QueryResults.java:155) at org.openrdf.repository.sail.SailTupleQuery.evaluate(SailTupleQuery.java:76) at com.bigdata.rdf.sail.webapp.BigdataRDFContext$TupleQueryTask.doQuery(BigdataRDFContext.java:1713) at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.innerCall(BigdataRDFContext.java:1569) at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:1534) at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:747) ... 4 more Caused by: com.bigdata.rdf.internal.NotMaterializedException: Sid(TermId(5U)[tag:superman]:TermId(1U)[tag:can]:TermId(2U)[tag:fly]) at com.bigdata.rdf.internal.impl.AbstractIV.getValue(AbstractIV.java:993) at com.bigdata.rdf.sail.Bigdata2Sesame2BindingSetIterator.getBindingSet(Bigdata2Sesame2BindingSetIterator.java:305) at com.bigdata.rdf.sail.Bigdata2Sesame2BindingSetIterator.hasNext(Bigdata2Sesame2BindingSetIterator.java:140) ... 11 more

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pchampin commented 4 years ago

I ran the query with the "explain" box checked, and got the following output:

http://champin.net/2020/blazegraph-issue-164/explain.html