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I downloaded a copy of Juno WTP and installed the M2E-WTP plugin, but I cannot run the Maven Builder on any project. I always get the following error message: Errors running builder 'Maven Project Builder' on project 'test2'. java.lang.NoClassDefFoundError: org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection at java.lang.J9VMInternals.verifyImpl(Native Method) at java.lang.J9VMInternals.verify(J9VMInternals.java:94) at java.lang.J9VMInternals.verify(J9VMInternals.java:92) at java.lang.J9VMInternals.verify(J9VMInternals.java:92) at java.lang.J9VMInternals.verify(J9VMInternals.java:92) at java.lang.J9VMInternals.prepare(J9VMInternals.java:516) at java.lang.Class.getDeclaredConstructors(Class.java:560) at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245) at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:98) at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:629) at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:831) at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:758) at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:255) at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:204) at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:954) at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:987) at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:950) at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000) at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45) at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84) at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52) at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68) at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1018) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.Scopes$1$1.get(Scopes.java:59) at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83) at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49) at org.sonatype.guice.plexus.binders.PlexusRequirements$RequirementProvider.get(PlexusRequirements.java:217) at org.sonatype.guice.plexus.binders.ProvidedPropertyBinding.injectProperty(ProvidedPropertyBinding.java:45) at org.sonatype.guice.bean.inject.BeanInjector.injectMembers(BeanInjector.java:53) at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:128) at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:117) at com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32) at com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:91) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:89) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:259) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1018) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000) at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45) at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84) at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52) at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68) at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1011) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.Scopes$1$1.get(Scopes.java:59) at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83) at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245) at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455) at org.eclipse.m2e.core.internal.embedder.MavenImpl.getConfiguredMojo(MavenImpl.java:342) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.reflectManifestGeneration(AbstractMavenArchiverConfigurator.java:406) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.generateManifest(AbstractMavenArchiverConfigurator.java:364) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.mavenProjectChanged(AbstractMavenArchiverConfigurator.java:183) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator$1.build(AbstractMavenArchiverConfigurator.java:133) at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:138) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1$1.call(MavenBuilder.java:117) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1$1.call(MavenBuilder.java:1) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137) at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.execute(MavenProjectManager.java:121) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:98) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:1) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:89) at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1305) at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:89) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295) at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374) at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143) at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ... 98 more After a lot of trial and error, I finally found a configuration that works. Removing all m2e connectors, and installing just "Maven Integration for Eclipse" (none of the optional ones) without the m2e-wtp plugin worked. It seems as though the m2e-wtp plugin is triggering this error msg. If I install the m2e-wtp plugin, the error reappears. If I delete it, the error goes away. I don't know if it is a missing component elsewhere that I need to install as well, but I have been able to reproduce this on different machines with different Eclipse installs. I had previously posted Bug #454662 (https://bugs.eclipse.org/bugs/show_bug.cgi?id=454662) to the m2e group, but it was closed due to it being a no longer supported version and having originally been discovered with IBM's RAD. I have been able to replicate it using a vanilla Juno download/install. I do not know if the policy is the same for m2e-wtp. I went hunting around, and found that the class in question exists in the org.codehaus.plexus.plexus-io package. I downloaded it from Maven Central (I guessed at the version and d/l'ed 2.0.6) and added the jar to my plugins/ folder, but it has not made any difference.
I accidentally pasted the stack trace from the J9 JVM instead of the Oracle Hotspot JVM. Please see below for the Hotspot stack trace: java.lang.NoClassDefFoundError: org/codehaus/plexus/components/io/resources/PlexusIoResourceCollection at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getDeclaredConstructors(Unknown Source) at com.google.inject.spi.InjectionPoint.forConstructorOf(InjectionPoint.java:245) at com.google.inject.internal.ConstructorBindingImpl.create(ConstructorBindingImpl.java:98) at com.google.inject.internal.InjectorImpl.createUninitializedBinding(InjectorImpl.java:629) at com.google.inject.internal.InjectorImpl.createJustInTimeBinding(InjectorImpl.java:831) at com.google.inject.internal.InjectorImpl.createJustInTimeBindingRecursive(InjectorImpl.java:758) at com.google.inject.internal.InjectorImpl.getJustInTimeBinding(InjectorImpl.java:255) at com.google.inject.internal.InjectorImpl.getBindingOrThrow(InjectorImpl.java:204) at com.google.inject.internal.InjectorImpl.getProviderOrThrow(InjectorImpl.java:954) at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:987) at com.google.inject.internal.InjectorImpl.getProvider(InjectorImpl.java:950) at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000) at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45) at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84) at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52) at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68) at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1018) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.Scopes$1$1.get(Scopes.java:59) at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83) at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49) at org.sonatype.guice.plexus.binders.PlexusRequirements$RequirementProvider.get(PlexusRequirements.java:217) at org.sonatype.guice.plexus.binders.ProvidedPropertyBinding.injectProperty(ProvidedPropertyBinding.java:45) at org.sonatype.guice.bean.inject.BeanInjector.injectMembers(BeanInjector.java:53) at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:128) at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:117) at com.google.inject.internal.ConstructorInjector.access$000(ConstructorInjector.java:32) at com.google.inject.internal.ConstructorInjector$1.call(ConstructorInjector.java:91) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:115) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:89) at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:259) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1018) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.internal.InjectorImpl.getInstance(InjectorImpl.java:1000) at org.sonatype.guice.bean.reflect.AbstractDeferredClass.get(AbstractDeferredClass.java:45) at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:84) at com.google.inject.internal.InternalFactoryToInitializableAdapter.provision(InternalFactoryToInitializableAdapter.java:52) at com.google.inject.internal.ProviderInternalFactory$1.call(ProviderInternalFactory.java:70) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:100) at org.sonatype.guice.plexus.lifecycles.PlexusLifecycleManager.onProvision(PlexusLifecycleManager.java:138) at com.google.inject.internal.ProvisionListenerStackCallback$Provision.provision(ProvisionListenerStackCallback.java:108) at com.google.inject.internal.ProvisionListenerStackCallback.provision(ProvisionListenerStackCallback.java:55) at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:68) at com.google.inject.internal.InternalFactoryToInitializableAdapter.get(InternalFactoryToInitializableAdapter.java:45) at com.google.inject.internal.InjectorImpl$3$1.call(InjectorImpl.java:965) at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1011) at com.google.inject.internal.InjectorImpl$3.get(InjectorImpl.java:961) at com.google.inject.Scopes$1$1.get(Scopes.java:59) at org.sonatype.guice.bean.locators.LazyBeanEntry.getValue(LazyBeanEntry.java:83) at org.sonatype.guice.plexus.locators.LazyPlexusBean.getValue(LazyPlexusBean.java:49) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:253) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:245) at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:455) at org.eclipse.m2e.core.internal.embedder.MavenImpl.getConfiguredMojo(MavenImpl.java:342) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.reflectManifestGeneration(AbstractMavenArchiverConfigurator.java:406) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.generateManifest(AbstractMavenArchiverConfigurator.java:364) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator.mavenProjectChanged(AbstractMavenArchiverConfigurator.java:183) at org.sonatype.m2e.mavenarchiver.internal.AbstractMavenArchiverConfigurator$1.build(AbstractMavenArchiverConfigurator.java:133) at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:138) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1$1.call(MavenBuilder.java:117) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1$1.call(MavenBuilder.java:1) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137) at org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.execute(MavenProjectManager.java:121) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:98) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:1) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:89) at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1305) at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:89) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295) at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374) at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143) at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) ... 94 more Session Data: eclipse.buildId=M20130204-1200 java.version=1.7.0_71 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.jee.product
As for m2e, we don't have plans on investigating issues with the Juno version. Anyways, I gave it a quick look : - downloaded eclipse javaee juno sr2 from https://eclipse.org/downloads/packages/release/juno/sr2 - installed m2e-wtp 1.0.1 from the marketplace https://marketplace.eclipse.org/content/maven-integration-eclipse-wtp-juno-0 I successfully created a war project, with a non default manifest, without any errors. So you may have a corrupt installation.
