At the start of the eclipse an error appeared

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When starting Eclipse this error appeared:

An Internal error occurred During: "Initializing Java Tooling". java.lang.Nullpointerexception

Why did that mistake appear?

These were the error messages found in the folder;

!ENTRY org.eclipse.osgi 2 0 2015-11-29 08:07:32.156
!MESSAGE While loading class "org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer", thread "Thread[Worker-1,5,main]" timed out waiting (5049ms) for thread "Thread[Worker-4,5,main]" to finish starting bundle "org.eclipse.m2e.jdt_1.6.2.20150902-0002 [550]". To avoid deadlock, thread "Thread[Worker-1,5,main]" is proceeding but "org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer" may not be fully initialized.
!STACK 0
org.osgi.framework.BundleException: Unable to acquire the state change lock for the module: osgi.identity; osgi.identity="org.eclipse.m2e.jdt"; type="osgi.bundle"; version:Version="1.6.2.20150902-0002"; singleton:="true" [id=550] STARTED [STARTED]
    at org.eclipse.osgi.container.Module.lockStateChange(Module.java:329)
    at org.eclipse.osgi.container.Module.start(Module.java:389)
    at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:454)
    at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
    at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:531)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324)
    at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:327)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:402)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:573)
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
    at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
    at org.eclipse.jdt.core.JavaCore.computeClasspathContainerInitializer(JavaCore.java:3345)
    at org.eclipse.jdt.core.JavaCore.getClasspathContainerInitializer(JavaCore.java:3321)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2849)
    at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1900)
    at org.eclipse.jdt.core.JavaCore.getClasspathContainer(JavaCore.java:3298)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2693)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2857)
    at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1995)
    at org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil.getComponentClasspathDependencies(ClasspathDependencyUtil.java:356)
    at org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil.getComponentClasspathDependencies(ClasspathDependencyUtil.java:276)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getJavaClasspathReferences(J2EEModuleVirtualComponent.java:272)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getNonManifestRefs(J2EEModuleVirtualComponent.java:242)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:166)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:214)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:207)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.hasConsumableReferences(SingleRootUtil.java:217)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.validateSingleRoot(SingleRootUtil.java:165)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.isSingleRoot(SingleRootUtil.java:93)
    at org.eclipse.jst.common.internal.modulecore.SingleRootExportParticipant.canOptimize(SingleRootExportParticipant.java:90)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.canOptimize(FlatVirtualComponent.java:203)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.cacheResources(FlatVirtualComponent.java:185)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.getChildModules(FlatVirtualComponent.java:160)
    at org.eclipse.wst.web.internal.deployables.FlatComponentDeployable.getExportModelChildren(FlatComponentDeployable.java:252)
    at org.eclipse.wst.web.internal.deployables.FlatComponentDeployable.getModules(FlatComponentDeployable.java:263)
    at org.eclipse.jst.server.tomcat.core.internal.TomcatServer.getChildModules(TomcatServer.java:378)
    at org.eclipse.wst.server.core.internal.Server.getChildModules(Server.java:2637)
    at org.eclipse.wst.server.core.internal.Server.visitModule(Server.java:3058)
    at org.eclipse.wst.server.core.internal.Server.visit(Server.java:3039)
    at org.eclipse.wst.server.core.internal.Server.getAllModules(Server.java:1542)
    at org.eclipse.wst.server.ui.internal.cnf.ServersView2$3.run(ServersView2.java:189)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.osgi 2 0 2015-11-29 08:07:36.045
!MESSAGE While loading class "org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer", thread "Thread[Worker-3,5,main]" timed out waiting (5000ms) for thread "Thread[Worker-4,5,main]" to finish starting bundle "org.eclipse.m2e.jdt_1.6.2.20150902-0002 [550]". To avoid deadlock, thread "Thread[Worker-3,5,main]" is proceeding but "org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer" may not be fully initialized.
!STACK 0
org.osgi.framework.BundleException: Unable to acquire the state change lock for the module: osgi.identity; osgi.identity="org.eclipse.m2e.jdt"; type="osgi.bundle"; version:Version="1.6.2.20150902-0002"; singleton:="true" [id=550] STARTED [STARTED]
    at org.eclipse.osgi.container.Module.lockStateChange(Module.java:329)
    at org.eclipse.osgi.container.Module.start(Module.java:389)
    at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:454)
    at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
    at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:531)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324)
    at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:327)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:402)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.eclipse.osgi.internal.framework.EquinoxBundle.loadClass(EquinoxBundle.java:573)
    at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:174)
    at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55)
    at org.eclipse.jdt.core.JavaCore.computeClasspathContainerInitializer(JavaCore.java:3345)
    at org.eclipse.jdt.core.JavaCore.getClasspathContainerInitializer(JavaCore.java:3321)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2849)
    at org.eclipse.jdt.internal.core.JavaModelManager$10.run(JavaModelManager.java:2774)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:2814)
    at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1895)
    at org.eclipse.jdt.core.JavaCore.initializeAfterLoad(JavaCore.java:4067)
    at org.eclipse.jdt.internal.ui.InitializeAfterLoadJob$RealJob.run(InitializeAfterLoadJob.java:36)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.osgi 2 0 2015-11-29 08:07:37.634
!MESSAGE While loading class "org.eclipse.m2e.jdt.internal.MavenClasspathHelpers", thread "Thread[Worker-1,5,main]" timed out waiting (5001ms) for thread "Thread[Worker-4,5,main]" to finish starting bundle "org.eclipse.m2e.jdt_1.6.2.20150902-0002 [550]". To avoid deadlock, thread "Thread[Worker-1,5,main]" is proceeding but "org.eclipse.m2e.jdt.internal.MavenClasspathHelpers" may not be fully initialized.
!STACK 0
org.osgi.framework.BundleException: Unable to acquire the state change lock for the module: osgi.identity; osgi.identity="org.eclipse.m2e.jdt"; type="osgi.bundle"; version:Version="1.6.2.20150902-0002"; singleton:="true" [id=550] STARTED [STARTED]
    at org.eclipse.osgi.container.Module.lockStateChange(Module.java:329)
    at org.eclipse.osgi.container.Module.start(Module.java:389)
    at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:454)
    at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:107)
    at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:531)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:324)
    at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:327)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:402)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
    at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
    at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer.initialize(MavenClasspathContainerInitializer.java:44)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2868)
    at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1900)
    at org.eclipse.jdt.core.JavaCore.getClasspathContainer(JavaCore.java:3298)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2693)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2857)
    at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1995)
    at org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil.getComponentClasspathDependencies(ClasspathDependencyUtil.java:356)
    at org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil.getComponentClasspathDependencies(ClasspathDependencyUtil.java:276)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getJavaClasspathReferences(J2EEModuleVirtualComponent.java:272)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getNonManifestRefs(J2EEModuleVirtualComponent.java:242)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:166)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:214)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:207)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.hasConsumableReferences(SingleRootUtil.java:217)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.validateSingleRoot(SingleRootUtil.java:165)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.isSingleRoot(SingleRootUtil.java:93)
    at org.eclipse.jst.common.internal.modulecore.SingleRootExportParticipant.canOptimize(SingleRootExportParticipant.java:90)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.canOptimize(FlatVirtualComponent.java:203)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.cacheResources(FlatVirtualComponent.java:185)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.getChildModules(FlatVirtualComponent.java:160)
    at org.eclipse.wst.web.internal.deployables.FlatComponentDeployable.getExportModelChildren(FlatComponentDeployable.java:252)
    at org.eclipse.wst.web.internal.deployables.FlatComponentDeployable.getModules(FlatComponentDeployable.java:263)
    at org.eclipse.jst.server.tomcat.core.internal.TomcatServer.getChildModules(TomcatServer.java:378)
    at org.eclipse.wst.server.core.internal.Server.getChildModules(Server.java:2637)
    at org.eclipse.wst.server.core.internal.Server.visitModule(Server.java:3058)
    at org.eclipse.wst.server.core.internal.Server.visit(Server.java:3039)
    at org.eclipse.wst.server.core.internal.Server.getAllModules(Server.java:1542)
    at org.eclipse.wst.server.ui.internal.cnf.ServersView2$3.run(ServersView2.java:189)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.core.resources 4 2 2015-11-29 08:07:46.845
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer.initialize(MavenClasspathContainerInitializer.java:46)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2868)
    at org.eclipse.jdt.internal.core.JavaModelManager$10.run(JavaModelManager.java:2774)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:2812)
    at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1895)
    at org.eclipse.jdt.core.JavaCore.getClasspathContainer(JavaCore.java:3298)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2693)
    at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2857)
    at org.eclipse.jdt.internal.core.ClasspathChange.generateDelta(ClasspathChange.java:235)
    at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:2032)
    at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:477)
    at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:299)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:289)
    at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:152)
    at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:373)
    at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1470)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2250)
    at org.eclipse.core.internal.events.NotificationManager$NotifyJob.run(NotificationManager.java:43)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.core.jobs 4 2 2015-11-29 08:07:47.275
!MESSAGE An internal error occurred during: "Initializing Java Tooling".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.m2e.jdt.internal.MavenClasspathContainerInitializer.initialize(MavenClasspathContainerInitializer.java:46)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeContainer(JavaModelManager.java:2868)
    at org.eclipse.jdt.internal.core.JavaModelManager$10.run(JavaModelManager.java:2774)
    at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)
    at org.eclipse.jdt.internal.core.JavaModelManager.initializeAllContainers(JavaModelManager.java:2814)
    at org.eclipse.jdt.internal.core.JavaModelManager.getClasspathContainer(JavaModelManager.java:1895)
    at org.eclipse.jdt.core.JavaCore.initializeAfterLoad(JavaCore.java:4067)
    at org.eclipse.jdt.internal.ui.InitializeAfterLoadJob$RealJob.run(InitializeAfterLoadJob.java:36)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

!ENTRY org.eclipse.egit.ui 2 0 2015-11-29 08:07:49.388
!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
user global configuration and to define the default location to store repositories: 'C:\Users\mary'. If this is
not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
EGit might behave differently since they see different configuration options.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
eclipse

  • Tried to delete Workspace and create a new one, as suggested in the @David response ?

  • There is nothing to do. Wait for the eclipse to pass so you can use your computer normally. </Joke>

3 answers

1


Check your Workspace/. Metadata /.log or the error view to get more information about what this actually means for Nullpointerexception.

Or as per answer to a similar question, delete your existing Workspace and recreate by adding your projects.

  • I just updated my post, take a look and see can help me.

0

You can tbm delete all the JARS you downloaded via Maven, sometimes some of them corrupt and cause problem in eclipse opening, you can delete them by going straight to M2 folder.

0

I had this same problem. And the solution that served me was to close all the projects and reopen what I was using. This solution was in a comment of the most voted reply of the link who passed above.

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