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https://issues.apache.org/jira/browse/JENA-1258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15642745#comment-15642745
]
Stian Soiland-Reyes commented on JENA-1258:
-------------------------------------------
Early access to {{NodeFmtLib}} is not needed to reproduce - the problem is
ARQConstants:
{code}
RDFS.label.asNode().toString(ARQConstants.getGlobalPrefixMap());
{code}
In 3.1.0 this will print out {{rdfs:label}, while 3.1.1 RC1 fails with the
"Contexts key is null" exception. ARQConstants is however documented as
"internal", but NodeFmtLib is exposed as "Presentation utilitiles for Nodes,
Triples, Quads and more."
The quick fix is for {{NodeFmtLib}} to also do {{JenaSystem.init()}}.
The "real" problem I guess is way too many static fields, methods and
initializers.. If ARQConstants is triggered first, it fails to finish
initializing its fields.
We probably need Jena 4 to fix that, get rid of all static fields and methods
for anything non-trivial.
> Context key is null (ARQConstants.registryFunctions) via NodeFmtLib
> -------------------------------------------------------------------
>
> Key: JENA-1258
> URL: https://issues.apache.org/jira/browse/JENA-1258
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 3.1.1
> Reporter: Stian Soiland-Reyes
>
> This small test, with no ARQ.init(), causes a problem in initializers:
> {code}
> @Test
> public void testName() throws Exception {
> Node node = NodeFactory.createLiteral("Hello world", "en");
> assertEquals("\"Hello world\"@en", NodeFmtLib.str(node));
> }
> {code}
> It fails with:
> {code}
> java.lang.ExceptionInInitializerError
> at org.apache.jena.riot.out.NodeFmtLib.<clinit>(NodeFmtLib.java:55)
> at org.apache.commons.rdf.jena.TestNodeStuff.testName(TestNodeStuff.java:15)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
> Caused by: org.apache.jena.sparql.ARQException: Context key is null
> at org.apache.jena.sparql.util.Context._put(Context.java:102)
> at org.apache.jena.sparql.util.Context.set(Context.java:94)
> at
> org.apache.jena.sparql.function.FunctionRegistry.set(FunctionRegistry.java:74)
> at
> org.apache.jena.sparql.function.FunctionRegistry.init(FunctionRegistry.java:48)
> at org.apache.jena.query.ARQ.init(ARQ.java:592)
> at org.apache.jena.sparql.system.InitARQ.start(InitARQ.java:29)
> at org.apache.jena.system.JenaSystem.lambda$init$2(JenaSystem.java:119)
> at java.util.ArrayList.forEach(ArrayList.java:1249)
> at org.apache.jena.system.JenaSystem.forEach(JenaSystem.java:194)
> at org.apache.jena.system.JenaSystem.forEach(JenaSystem.java:171)
> at org.apache.jena.system.JenaSystem.init(JenaSystem.java:117)
> at org.apache.jena.sparql.ARQConstants.<clinit>(ARQConstants.java:35)
> ... 25 more
> {code}
> closer debugging reveals that it is trying to set a context with the static
> {{ARQConstants.registryFunctions}} which is still null:
> {code}
> Thread [main] (Suspended (breakpoint at line 102 in Context))
> owns: Object (id=65)
> owns: Class<T> (org.apache.jena.system.JenaSystem) (id=61)
> owns: Object (id=66)
> Context._put(Symbol, Object) line: 102
> Context.set(Symbol, Object) line: 94
> FunctionRegistry.set(Context, FunctionRegistry) line: 74
> FunctionRegistry.init() line: 48
> ARQ.init() line: 592
> InitARQ.start() line: 29
> JenaSystem.lambda$init$2(JenaSubsystemLifecycle) line: 119
> 2009221452.accept(Object) line: not available
> ArrayList<E>.forEach(Consumer<? super E>) line: 1249
> JenaSystem.forEach(Consumer<JenaSubsystemLifecycle>,
> Comparator<JenaSubsystemLifecycle>) line: 194
> JenaSystem.forEach(Consumer<JenaSubsystemLifecycle>) line: 171
> JenaSystem.init() line: 117
> ARQConstants.<clinit>() line: 35
> NodeFmtLib.<clinit>() line: 55
> TestNodeStuff.testName() line: 17
> NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not
> available [native method]
> NativeMethodAccessorImpl.invoke(Object, Object[]) line: 62
> DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43
> Method.invoke(Object, Object...) line: 498
> FrameworkMethod$1.runReflectiveCall() line: 50
> FrameworkMethod$1(ReflectiveCallable).run() line: 12
> FrameworkMethod.invokeExplosively(Object, Object...) line: 47
> InvokeMethod.evaluate() line: 17
> BlockJUnit4ClassRunner(ParentRunner<T>).runLeaf(Statement, Description,
> RunNotifier) line: 325
> BlockJUnit4ClassRunner.runChild(FrameworkMethod, RunNotifier) line: 78
> BlockJUnit4ClassRunner.runChild(Object, RunNotifier) line: 57
> ParentRunner$3.run() line: 290
> ParentRunner$1.schedule(Runnable) line: 71
> BlockJUnit4ClassRunner(ParentRunner<T>).runChildren(RunNotifier) line:
> 288
> ParentRunner<T>.access$000(ParentRunner, RunNotifier) line: 58
> ParentRunner$2.evaluate() line: 268
> BlockJUnit4ClassRunner(ParentRunner<T>).run(RunNotifier) line: 363
> JUnit4TestReference.run(TestExecution) line: 86
> TestExecution.run(ITestReference[]) line: 38
> RemoteTestRunner.runTests(String[], String, TestExecution) line: 459
> RemoteTestRunner.runTests(TestExecution) line: 678
> RemoteTestRunner.run() line: 382
> RemoteTestRunner.main(String[]) line: 192
> {code}
> Workaround:
> {code}
> ARQ.init(); // or JenaSystem.init()
> {code}
> before using NodeFmtLib.
> Should NodeFactory ensure {{JenaSystem.init()}}
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