Bug 334852

Description Mirko Raner 2011-01-20 02:36:14 EST

Build Identifier: Indigo M4, Xtext 2.0.0 M4, Xtext ANTLR SDK 2.0.0 M3

In a fresh installation of Indigo M4 with a clean workspace the initial build of the "Domainmodel" demo fails with an exception in the MWE2 workflow:

2    [main] ERROR mf.mwe2.launch.runtime.Mwe2Launcher  - Lorg/apache/commons/logging/Log;
java.lang.NoClassDefFoundError: Lorg/apache/commons/logging/Log;
	at java.lang.Class.getDeclaredFields0(Native Method)
	at java.lang.Class.privateGetDeclaredFields(Class.java:2259)
	at java.lang.Class.getDeclaredFields(Class.java:1715)
	at org.eclipse.xtext.common.types.access.impl.DeclaredTypeFactory.createFields(DeclaredTypeFactory.java:272)
	at org.eclipse.xtext.common.types.access.impl.DeclaredTypeFactory.createType(DeclaredTypeFactory.java:81)
	at org.eclipse.xtext.common.types.access.impl.DeclaredTypeFactory.createType(DeclaredTypeFactory.java:1)
	at org.eclipse.xtext.common.types.access.impl.ClassMirror.initialize(ClassMirror.java:42)
	at org.eclipse.xtext.common.types.access.TypeResource.doLoad(TypeResource.java:86)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1494)
	at org.eclipse.xtext.common.types.access.TypeResource.load(TypeResource.java:74)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:255)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoadHelper(ResourceSetImpl.java:270)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:397)
	at org.eclipse.xtext.resource.SynchronizedXtextResourceSet.getResource(SynchronizedXtextResourceSet.java:23)
	at org.eclipse.xtext.common.types.access.impl.ClasspathTypeProvider.findTypeByName(ClasspathTypeProvider.java:65)
	at org.eclipse.xtext.common.types.xtext.AbstractTypeScope.getLocalElements(AbstractTypeScope.java:55)
	at org.eclipse.xtext.scoping.impl.AbstractScope.getElements(AbstractScope.java:55)
	at org.eclipse.xtext.linking.impl.ImportedNamesAdapter$WrappingScope.getElements(ImportedNamesAdapter.java:55)
	at org.eclipse.xtext.scoping.impl.AbstractScope.getElements(AbstractScope.java:57)
	at org.eclipse.xtext.scoping.impl.ImportScope.getElements(ImportScope.java:88)
	at org.eclipse.xtext.scoping.impl.AbstractScope.getElements(AbstractScope.java:57)
	at org.eclipse.xtext.scoping.impl.ImportScope.getElements(ImportScope.java:88)
	at org.eclipse.xtext.scoping.impl.ImportScope$4.apply(ImportScope.java:147)
	at org.eclipse.xtext.scoping.impl.ImportScope$4.apply(ImportScope.java:1)
	at com.google.common.collect.Lists$TransformingRandomAccessList.get(Lists.java:431)
	at java.util.AbstractList$Itr.next(AbstractList.java:422)
	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:602)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:135)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:130)
	at com.google.common.collect.Iterators$8.hasNext(Iterators.java:693)
	at com.google.common.collect.Iterators$5.hasNext(Iterators.java:504)
	at org.eclipse.xtext.scoping.impl.ImportScope$5.iterator(ImportScope.java:166)
	at com.google.common.collect.Iterables$3.apply(Iterables.java:422)
	at com.google.common.collect.Iterables$3.apply(Iterables.java:420)
	at com.google.common.collect.Iterators$8.next(Iterators.java:697)
	at com.google.common.collect.Iterators$5.hasNext(Iterators.java:505)
	at com.google.common.collect.Iterators$7.computeNext(Iterators.java:601)
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:135)
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:130)
	at com.google.common.collect.Iterators$5.hasNext(Iterators.java:504)
	at org.eclipse.xtext.scoping.impl.AbstractScope.getSingleElement(AbstractScope.java:47)
	at org.eclipse.xtext.linking.impl.DefaultLinkingService.getLinkedObjects(DefaultLinkingService.java:114)
	at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:168)
	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:219)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:202)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:262)
	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1483)
	at org.eclipse.emf.mwe2.language.mwe2.impl.ReferrableImpl.getType(ReferrableImpl.java:98)
	at org.eclipse.emf.mwe2.language.mwe2.impl.ReferrableImpl.eGet(ReferrableImpl.java:177)
	at org.eclipse.emf.mwe2.language.mwe2.impl.ComponentImpl.eGet(ComponentImpl.java:220)
	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1021)
	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1013)
	at org.eclipse.emf.ecore.util.EContentsEList$FeatureIteratorImpl.hasNext(EContentsEList.java:409)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveCrossReferences(EcoreUtil.java:307)
	at org.eclipse.emf.ecore.util.EcoreUtil.resolveAll(EcoreUtil.java:301)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:82)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:75)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:66)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Runner.run(Mwe2Runner.java:57)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.run(Mwe2Launcher.java:74)
	at org.eclipse.emf.mwe2.launch.runtime.Mwe2Launcher.main(Mwe2Launcher.java:35)

Adding a Require-Bundle for org.apache.commons.logging in the MANIFEST.MF for org.eclipse.xtext.example.domainmodel fixes this problem.

I'm not exactly sure why commons.logging is not on the classpath when the Mwe2Launcher is executed. org.apache.commons.cli (which is a required bundle) does have a dependency on commons.logging but does not reexport it. org.eclipse.emf.mwe.utils imports the org.apache.commons.logging package, but does not specifically require the bundle (i.e., leaving it open where the package eventually comes from). Since the Mwe2Launcher is not run as an Eclipse plug-in the resolution might be slightly different from what it would be for running an actual plug-in.


Reproducible: Always