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https://issues.apache.org/jira/browse/JENA-1307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15899751#comment-15899751
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Andy Seaborne commented on JENA-1307:
-------------------------------------
A workaround for Jena 3.2.0:
Call {{JenaSystem.init()}} before using {{UpdateFactory.create()}}.
> Null Pointer Exception when calling UpdateFactory.create()
> -----------------------------------------------------------
>
> Key: JENA-1307
> URL: https://issues.apache.org/jira/browse/JENA-1307
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 3.2.0
> Environment: UBUNTU 16,java version "1.8.0_121"
> Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
> Reporter: Mukhtar Baloch
>
> When I call UpdateFactory.create()
> I get a Null Pointer Exception.
> Output
> Exception in thread "main" java.lang.ExceptionInInitializerError
> at
> org.apache.jena.rdf.model.impl.ResourceImpl.fresh(ResourceImpl.java:135)
> at
> org.apache.jena.rdf.model.impl.ResourceImpl.<init>(ResourceImpl.java:85)
> at
> org.apache.jena.rdf.model.ResourceFactory$Impl.createResource(ResourceFactory.java:297)
> at
> org.apache.jena.rdf.model.ResourceFactory.createResource(ResourceFactory.java:92)
> at org.apache.jena.vocabulary.RDFS.resource(RDFS.java:35)
> at org.apache.jena.vocabulary.RDFS.<clinit>(RDFS.java:40)
> at org.apache.jena.shared.PrefixMapping.<clinit>(PrefixMapping.java:219)
> at org.apache.jena.sparql.core.Prologue.<init>(Prologue.java:38)
> at org.apache.jena.update.UpdateRequest.<init>(UpdateRequest.java:46)
> at org.apache.jena.update.UpdateFactory.create(UpdateFactory.java:38)
> at edu.kit.ecodicology.rdfexample.App.algebra(App.java:80)
> at edu.kit.ecodicology.rdfexample.App.main(App.java:140)
> Caused by: java.lang.NullPointerException
> at org.apache.jena.rdf.model.impl.ModelCom.add(ModelCom.java:1191)
> at
> org.apache.jena.assembler.assemblers.AssemblerGroup$ExpandingAssemblerGroup.implementWith(AssemblerGroup.java:92)
> at
> org.apache.jena.assembler.ConstAssembler.general(ConstAssembler.java:137)
> at
> org.apache.jena.sparql.core.assembler.AssemblerUtils.registerDataset(AssemblerUtils.java:68)
> at
> org.apache.jena.sparql.core.assembler.AssemblerUtils.init(AssemblerUtils.java:60)
> at org.apache.jena.query.ARQ.init(ARQ.java:590)
> at org.apache.jena.sparql.system.InitARQ.start(InitARQ.java:29)
> at org.apache.jena.system.JenaSystem.lambda$init$50(JenaSystem.java:119)
> at java.util.ArrayList.forEach(ArrayList.java:1249)
> at org.apache.jena.system.JenaSystem.forEach(JenaSystem.java:194)
> at org.apache.jena.system.JenaSystem.forEach(JenaSystem.java:171)
> at org.apache.jena.system.JenaSystem.init(JenaSystem.java:117)
> at org.apache.jena.graph.NodeFactory.<clinit>(NodeFactory.java:32)
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