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Eclipse Neon错误：添加Lucene 6.6依赖项以构建路径时出现Nullpointerexception（org.eclipse.jface）

[英]Eclipse Neon Error: Nullpointerexception when adding Lucene 6.6 dependencies to build path (org.eclipse.jface)

原文 2017-07-17 08:45:43 2 1 java/ eclipse/ jar/ lucene/ dependencies

I'm developing with lucene 6.6 in eclipse neon 3 and when i add different lucene jars (eg lucene-6.6.0-core.jar ) to the build path of my project i get a popup with a nullpointerexception. 我正在使用Eclipse Neon 3中的lucene 6.6进行开发，当我向项目的构建路径中添加不同的lucene jar（例如lucene-6.6.0-core.jar ）时，我会弹出带有nullpointerexception的弹出窗口。 It then happens everytime i select the project or content within it. 每当我选择项目或其中的内容时，它就会发生。 Confusingly my error log is not mentioning lucene but a plugin called "org.eclipse.jface": 令人困惑的是我的错误日志没有提到lucene，而是一个名为“ org.eclipse.jface”的插件：

!ENTRY org.eclipse.jface 4 2 2017-07-17 10:29:55.989 !MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface". ！ENTRY org.eclipse.jface 4 2 2017-07-17 10：29：55.989！MESSAGE从插件调用代码“ org.eclipse.jface”时发生问题。 !STACK 0 java.lang.NullPointerException at org.eclipse.jst.jee.ui.internal.navigator.web.WebAppProvider.getImage(WebAppProvider.java:99) at org.eclipse.jst.jee.ui.internal.navigator.Web25LabelProvider.getImage(Web25LabelProvider.java:47) at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.findImage(NavigatorContentServiceLabelProvider.java:199) at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getColumnImage(NavigatorContentServiceLabelProvider.java:107) at org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getImage(NavigatorContentServiceLabelProvider.java:99) at org.eclipse.ui.internal.navigator.NavigatorDecoratingLabelProvider$StyledLabelProviderAdapter.getImage(NavigatorDecoratingLabelProvider.java:57) at org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.getImage(DelegatingStyledCellLabelProvider.java:195) at org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider.getImage(DecoratingStyledCellLabelProvi ！STACK 0 org.eclipse.jst.jee.ui.internal.navigator处的org.eclipse.jst.jee.ui.internal.navigator.web.WebAppProvider.getImage（WebAppProvider.java:99）处的java.lang.NullPointerException。 org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.findImage（NavigatorContentServiceLabelProvider.java:199）处的Web25LabelProvider.getImage（Web25LabelProvider.java:47）org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getColumnImage（NavigatorContentServiceLabelProvider.java： 107）在org.eclipse.ui.internal.navigator.NavigatorContentServiceLabelProvider.getImage（NavigatorContentServiceLabelProvider.java:99）在org.eclipse.ui.internal.navigator.NavigatorDecoratingLabelProvider $ StyledLabelProviderAdapter.getImage（NavigatorDecoratingLabelProvider.java:57）在org.eclipse org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider.getImage（DecoratingStyledCellLabelProvi上的.jface.viewers.DelegatingStyledCellLabelProvider.getImage（DelegatingStyledCellLabelProvider.java:195） der.java:168) at org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.update(DelegatingStyledCellLabelProvider.java:121) at org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider.update(DecoratingStyledCellLabelProvider.java:131) at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:141) at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:949) at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:118) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:50) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173) at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1029) at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:474) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFa der.java:168）位于org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.update（DelegatingStyledCellLabelProvider.java:121）位于org.eclipse.jface.viewers.DecoratingStyledCellLabelProvider.update（DecoratingStyledCellLabelProvider.java:131）位于org.eclipse.jface org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem（AbstractTreeViewer.java:949）上的.viewers.ViewerColumn.refresh（ViewerColumn.java:141）org.eclipse.jface.viewers.AbstractTreeViewer $ UpdateItemSafeRunnable.run（AbstractTreeViewer.java ：118），位于org.eclipse.ui.internal.JFaceUtil $ 1.run（JFaceUtil.java：50），位于org.eclipse.ui.internal.JFaceUtil $ 1.run（JFaceUtil.java：50），位于org.eclipse.jface.util org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem（AbstractTreeViewer.java:1029）的.SafeRunnable.run（SafeRunnable.java:173）org.eclipse.jface.viewers.StructuredViewer $ UpdateItemSafeRunnable.run（StructuredViewer.java:474）的。）org.eclipse.ui.internal.JFaceUtil $ 1.run（JFa）上的org.eclipse.core.runtime.SafeRunner.run（SafeRunner.java:42） ceUtil.java:50) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:173) at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2170) at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:843) at org.eclipse.jface.viewers.AbstractTreeViewer.createAddedElements(AbstractTreeViewer.java:416) at org.eclipse.jface.viewers.AbstractTreeViewer.internalAdd(AbstractTreeViewer.java:285) at org.eclipse.jface.viewers.TreeViewer.internalAdd(TreeViewer.java:615) at org.eclipse.jface.viewers.AbstractTreeViewer.add(AbstractTreeViewer.java:160) at org.eclipse.ui.navigator.CommonViewer.add(CommonViewer.java:302) at org.eclipse.jst.j2ee.navigator.internal.ClearPlaceHolderJob.runInUIThread(ClearPlaceHolderJob.java:42) at org.eclipse.jst.jee.ui.internal.navigator.ClearJeePlaceHolderJob.runInUIThread(ClearJeePlaceHolderJob.java:32) at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:97) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.ja ceUtil.java:50）位于org.eclipse.jface.util.SafeRunnable.run（SafeRunnable.java:173）位于org.eclipse.jface.viewers.StructuredViewer.updateItem（StructuredViewer.java:2170）位于org.eclipse.jface org.eclipse.jface.viewers.AbstractTreeViewer.createAddedElements（AbstractTreeViewer.java:416）的.viewers.AbstractTreeViewer.createTreeItem（AbstractTreeViewer.java:843）org.eclipse.jface.viewers.AbstractTreeViewer.internalAdd（AbstractTreeViewer.java:285）），位于org.eclipse.jface.viewers.AbstractTreeViewer.add（AbstractTreeViewer.java:160），位于org.eclipse.ui.navigator.CommonViewer，位于org.eclipse.jface.viewers.TreeViewer.internalAdd（TreeViewer.java:615）处。在org.eclipse.jst.jee.ui.internal.navigator.ClearJeePlaceHolderJob（run）处的org.eclipse.jst.j2ee.navigator.internal.ClearPlaceHolderJob.runInUIThread（ClearPlaceHolderJob.java:42）处添加（CommonViewer.java:302） org.eclipse.ui.progress.UIJob $ 1.run（UIJob.java:97）处的org.eclipse.swt.widgets.RunnableLock.run（RunnableLock.ja）的ClearJeePlaceHolderJob.java:32） va:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4211) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3827) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equin va：35）在org.eclipse.swt.widgets.Synchronizer.runAsyncMessages（Synchronizer.java:182）在org.eclipse.swt.widgets.Display.runAsyncMessages（Display.java:4211）在org.eclipse.swt.widgets在org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine $ 4.run（PartRenderingEngine.java:1121）的org.eclipse.core.databinding.observable.Realm的.Display.readAndDispatch（Display.java:3827）。 org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI（org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run（PartRenderingEngine.java:1022）处的runWithDefault（Realm.java:336） E4Workbench.java:150），位于org.eclipse.ui.internal.Workbench $ 5.run（Workbench.java:693），位于org.eclipse.core.databinding.observable.Realm.runWithDefault（Realm.java:336），位于org。 org.eclipse.ui.PlatformUI.eclipse.ui.internal.Workbench.createAndRunWorkbench（Workbench.java:610）org.eclipse.ui.internal.ide.application.IDEApplication.start（ org.eclipse.equin上的IDEApplication.java:138） ox.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 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610) at org.eclipse.equinox.launcher.Main.run(Main.java:1519) org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication（EclipseAppLauncher.java:134）上的ox.internal.app.EclipseAppHandle.run（EclipseAppHandle.java:196）在org.eclipse.core.runtime.internal上。 org.eclipse.core.runtime.adaptor.EclipseStarter.run（EclipseStarter.java:388）上的Adaptor.EclipseAppLauncher.start（EclipseAppLauncher.java:104）org.eclipse.core.runtime.adaptor.EclipseStarter.run（EclipseStarter。 java：243）位于sun.reflect.NativeMethodAccessorImpl.invoke0（本地方法）位于sun.reflect.NativeMethodAccessorImpl.invoke（未知源）位于java.lang.reflect.Method.invoke处sun.reflect.DelegatingMethodAccessorImpl.invoke（未知源）（来源不明），位于org.eclipse.equinox.launcher.Main.invokeFramework（Main.java:673），位于org.eclipse.equinox.launcher.Main.basicRun（Main.java:610），位于org.eclipse.equinox.launcher .Main.run（Main.java:1519）

Is this a bug in eclipse or lucene? 这是日食还是月饼中的虫子？ I found other topics about this plubing but it didn't help me a lot. 我发现了有关这种润滑的其他主题，但是对我没有太大帮助。 Of course i tried things like cleaning the project etc. Does anyone know how i can solve this? 当然，我尝试过诸如清理项目之类的事情。有人知道我能解决这个问题吗？ I am in badly need to continue my development of my lucene app. 我非常需要继续开发我的Lucene应用程序。

1 个解决方案

Ok, it seems like this problem was the consequence of another problem in my project: Eclipse could not load the project descriptor, because the web.xml had an error. 好的，这个问题似乎是我项目中另一个问题的结果：Eclipse无法加载项目描述符，因为web.xml出现错误。 Since i fixed this the other error is also gone. 自从我解决了这个错误，其他错误也消失了。