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NullPointerException in IDE [message #1776014]

Thu, 09 November 2017 05:42

Eclipse User

I'm getting this error in Eclipse intermittently.

"An error has occurred. See error log for more details."

java.lang.NullPointerException.

This is in Eclipse IDE, not from running my code

the error log says the following:

null
org.eclipse.jface
Error
Mon Nov 06 02:59:08 CST 2017
Problems occurred when invoking code from plug-in: "org.eclipse.jface".

java.lang.NullPointerException
at org.eclipse.core.runtime.Path.<init>(Path.java:206)
at org.eclipse.core.internal.resources.WorkspaceRoot.getProject(WorkspaceRoot.java:145)
at org.eclipse.core.internal.resources.ProjectDescription.getAllBuildConfigReferences(ProjectDescription.java:261)
at org.eclipse.core.internal.resources.ProjectDescription.getAllReferences(ProjectDescription.java:221)
at org.eclipse.core.internal.resources.Project.getReferencedProjects(Project.java:469)
at org.eclipse.ui.actions.CloseUnrelatedProjectsAction.buildConnectedComponents(CloseUnrelatedProjectsAction.java:78)
at org.eclipse.ui.actions.CloseUnrelatedProjectsAction.computeRelated(CloseUnrelatedProjectsAction.java:195)
at org.eclipse.ui.actions.CloseUnrelatedProjectsAction.getSelectedResources(CloseUnrelatedProjectsAction.java:212)
at org.eclipse.ui.actions.SelectionListenerAction.selectionIsOfType(SelectionListenerAction.java:240)
at org.eclipse.ui.actions.CloseResourceAction.updateSelection(CloseResourceAction.java:187)
at org.eclipse.ui.actions.BaseSelectionListenerAction.selectionChanged(BaseSelectionListenerAction.java:124)
at org.eclipse.jdt.ui.actions.ProjectActionGroup.performSelectionChanged(ProjectActionGroup.java:137)
at org.eclipse.jdt.ui.actions.ProjectActionGroup$1.selectionChanged(ProjectActionGroup.java:115)
at org.eclipse.jface.viewers.Viewer$1.run(Viewer.java:155)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:44)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:152)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2180)
at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1223)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1252)
at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:240)
at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:235)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:400)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:86)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4428)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4238)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3817)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1150)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1039)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:680)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:594)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:151)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
at org.eclipse.equinox.launcher.Main.run(Main.java:1499)
at org.eclipse.equinox.launcher.Main.main(Main.java:1472)

And btw I'm using Eclipse Oxygen 4.7.1a

Re: NullPointerException in IDE [message #1776120 is a reply to message #1776014]

Sun, 12 November 2017 04:26

Eclipse User

Really? Nobody knows what causes this?

Re: NullPointerException in IDE [message #1776124 is a reply to message #1776120]

Sun, 12 November 2017 09:21

Eclipse User

Well, it looks like some action is trying to update based on the selection and some project in your workspace is causing a problem during that update. But I've never seen this and I don't know what would cause this. Perhaps refreshing the projects in the workspace will help.

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