Errors when closing and reopening a maven project ------------------------------------------------- Key: JBIDE-15178 URL: https://issues.jboss.org/browse/JBIDE-15178 Project: Tools (JBoss Tools) Issue Type: Bug Components: common/jst/core, upstream Affects Versions: 4.1.0.CR1 Reporter: Jiri Peterka Assignee: Viacheslav Kabanovich Fix For: 4.2.0.Beta2 When closing created project there is this NPE (#1): {code}java.lang.NullPointerException at org.eclipse.jst.common.project.facet.core.libprov.internal.LibraryProviderFrameworkImpl.getCurrentProvider(LibraryProviderFrameworkImpl.java:144) at org.eclipse.jst.common.project.facet.core.libprov.LibraryProviderFramework.getCurrentProvider(LibraryProviderFramework.java:81) at org.eclipse.jst.common.project.facet.core.libprov.user.UserLibraryProviderInstallOperationConfig.reset(UserLibraryProviderInstallOperationConfig.java:280) at org.eclipse.jst.common.project.facet.core.libprov.user.UserLibraryProviderInstallOperationConfig.init(UserLibraryProviderInstallOperationConfig.java:153) at org.eclipse.jst.j2ee.internal.common.classpath.WtpUserLibraryProviderInstallOperationConfig.init(WtpUserLibraryProviderInstallOperationConfig.java:64) at org.eclipse.jst.common.project.facet.core.libprov.LibraryProviderInstallOperationConfig.init(LibraryProviderInstallOperationConfig.java:46) at org.eclipse.jst.common.project.facet.core.libprov.internal.LibraryProvider.createInstallOperationConfig(LibraryProvider.java:396) at org.eclipse.jst.common.project.facet.core.libprov.LibraryInstallDelegate.refresh(LibraryInstallDelegate.java:409) at org.eclipse.jst.common.project.facet.core.libprov.LibraryInstallDelegate$2.handleEvent(LibraryInstallDelegate.java:132) at org.eclipse.wst.common.project.facet.core.events.internal.ProjectListenerRegistry.notifyListeners(ProjectListenerRegistry.java:76) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.notifyListeners(FacetedProject.java:1326) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.refresh(FacetedProject.java:1825) at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.refresh(FacetedProject.java:1678) at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectFrameworkImpl$ResourceChangeListener.resourceChanged(FacetedProjectFrameworkImpl.java:2364) at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285) at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149) at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:396) at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1531) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:45) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) {code} And after reopening there is this one (#2) {code} org.eclipse.core.internal.resources.ResourceException: The resource tree is locked for modifications. at org.eclipse.core.internal.resources.WorkManager.checkIn(WorkManager.java:116) at org.eclipse.core.internal.resources.Workspace.prepareOperation(Workspace.java:2283) at org.eclipse.core.internal.resources.Folder.create(Folder.java:92) at org.eclipse.core.internal.resources.Folder.create(Folder.java:125) at org.jboss.tools.common.model.filesystems.impl.FileSystemImpl.getResource(FileSystemImpl.java:87) at org.jboss.tools.common.model.filesystems.impl.FileSystemsImpl.addChild_0(FileSystemsImpl.java:64) at org.jboss.tools.common.model.impl.XModelObjectImpl.addChild(XModelObjectImpl.java:273) at org.jboss.tools.jst.web.model.helpers.InnerModelHelper.createXModel(InnerModelHelper.java:72) at org.jboss.tools.jst.web.kb.internal.scanner.ClassPathMonitor.init(ClassPathMonitor.java:60) at org.jboss.tools.jst.web.kb.internal.KbProject.setProject(KbProject.java:202) at org.eclipse.core.internal.resources.NatureManager.createNature(NatureManager.java:233) at org.eclipse.core.internal.resources.Project.getNature(Project.java:448) at org.jboss.tools.jst.web.kb.KbProjectFactory.getKbProject(KbProjectFactory.java:67) at org.jboss.tools.jst.web.kb.WebKbPlugin$RCL.resourceChanged(WebKbPlugin.java:155) at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285) at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149) at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:396) at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1531) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:45) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) {code}