bartalusg opened a new issue, #3751: URL: https://github.com/apache/jena/issues/3751
### Version 6.0.0 ### What happened? When executing the query: ``` PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX sh: <http://www.w3.org/ns/shacl#> PREFIX owl: <http://www.w3.org/2002/07/owl#> SELECT ?classId ?nodeShape WHERE { ?classId a owl:Class . { ?nodeShape sh:targetClass ?classId . } UNION { ?classId rdfs:subClassOf+ ?superClassId . ?superClassId a owl:Class . ?nodeShape sh:targetClass ?superClassId . } } ``` I receive the following error: ``` at org.eclipse.jetty.server.handler.ContextHandler.handle(ContextHandler.java:1224) at org.eclipse.jetty.server.Server.handle(Server.java:197) at org.eclipse.jetty.server.internal.HttpChannelState$HandlerInvoker.run(HttpChannelState.java:720) at org.eclipse.jetty.server.internal.HttpConnection.onFillable(HttpConnection.java:412) at org.eclipse.jetty.server.internal.HttpConnection$FillableCallback.succeeded(HttpConnection.java:1810) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105) at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:54) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:492) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.epcRunTask(AdaptiveExecutionStrategy.java:428) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:401) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:255) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:204) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:317) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:1009) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1239) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1194) at java.base/java.lang.Thread.run(Unknown Source) Caused by: org.apache.jena.sparql.ARQInternalErrorException: Peek iterator is already empty at org.apache.jena.tdb2.solver.OpExecutorTDB2.reorder(OpExecutorTDB2.java:307) at org.apache.jena.tdb2.solver.OpExecutorTDB2.optimizeExecuteTriples(OpExecutorTDB2.java:207) at org.apache.jena.tdb2.solver.OpExecutorTDB2.optimizeExecuteQuads(OpExecutorTDB2.java:242) at org.apache.jena.tdb2.solver.OpExecutorTDB2.execute(OpExecutorTDB2.java:167) at org.apache.jena.sparql.engine.main.ExecutionDispatch.visit(ExecutionDispatch.java:64) at org.apache.jena.sparql.algebra.op.OpQuadPattern.visit(OpQuadPattern.java:90) at org.apache.jena.sparql.engine.main.ExecutionDispatch.exec(ExecutionDispatch.java:46) at org.apache.jena.sparql.engine.main.OpExecutor.exec(OpExecutor.java:118) at org.apache.jena.tdb2.solver.OpExecutorTDB2.exec(OpExecutorTDB2.java:91) at org.apache.jena.sparql.engine.main.OpExecutor.execute(OpExecutor.java:228) at org.apache.jena.sparql.engine.main.ExecutionDispatch.visit(ExecutionDispatch.java:120) at org.apache.jena.sparql.algebra.op.OpSequence.visit(OpSequence.java:77) at org.apache.jena.sparql.engine.main.ExecutionDispatch.exec(ExecutionDispatch.java:46) at org.apache.jena.sparql.engine.main.OpExecutor.exec(OpExecutor.java:118) at org.apache.jena.tdb2.solver.OpExecutorTDB2.exec(OpExecutorTDB2.java:91) at org.apache.jena.sparql.engine.main.OpExecutor.execute(OpExecutor.java:90) at org.apache.jena.sparql.engine.main.QC.execute(QC.java:61) at org.apache.jena.sparql.engine.main.iterator.QueryIterUnion$1.hasNextBinding(QueryIterUnion.java:83) ``` ### Relevant output and stacktrace ```shell ``` ### Are you interested in making a pull request? None -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
