我想在工具栏中进行调试操作。但是每当我退出日食并再次打开时，它就消失了。我总是要去Window > Perspective > Customize Perspective > Action Bar Availability并重新检查调试框，我厌倦了这样做。
此外，当我调试程序并点击断点时，我会弹出'Perspective Switch Job' has encountered a problem.，其详细信息为Error java.lang.NullPointerException。有时当弹出这个弹出窗口时，我工具栏上的调试操作会消失，并且必须按照上面的说明将其恢复。
我已经尝试将一个透视图保存到Debug工具栏并将其设置为默认透视图但是它没有工作，我不确定我是否做错了。
我正在使用Eclipse IDE for Java Developers，Version：Mars Release（4.5.0）。我正在使用Pydev，我的代码几乎只有python。我没有在这台机器上开发Java。
!ENTRY org.eclipse.ui 4 4 2016-01-25 09:40:26.700
!MESSAGE Error
!STACK 0
java.lang.NullPointerException
at org.eclipse.ui.internal.WorkbenchPage.busyShowView(WorkbenchPage.java:1270)
at org.eclipse.ui.internal.WorkbenchPage$12.run(WorkbenchPage.java:4211)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchPage.showView(WorkbenchPage.java:4207)
at org.eclipse.debug.internal.ui.views.ViewContextService.showViewQuiet(ViewContextService.java:1175)
at org.eclipse.debug.internal.ui.launchConfigurations.PerspectiveManager$4.runInUIThread(PerspectiveManager.java:528)
at org.eclipse.debug.internal.ui.launchConfigurations.PerspectiveManager$MyUIJob$1.run(PerspectiveManager.java:229)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4155)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3772)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
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:380)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
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:669)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
at org.eclipse.equinox.launcher.Main.run(Main.java:1515)