Hadoop eclipse plugin stopped working - eclipse

Question

hi all i am using hadoop2.2.0 and eclipse juno and hadoop eclipse plug in it was working fine before but suddenly it stopped working it not even showing dfs locations in eclipse plz help it showing following error
Plug-in org.apache.hadoop.eclipse was unable to load class org.apache.hadoop.eclipse.view.servers.ServerView.
and this is error log
eclipse.buildId=I20120608-1400
java.version=1.6.0_31
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_IN
Framework arguments: -product org.eclipse.epp.package.jee.product
Command-line arguments: -os linux -ws gtk -arch x86 -product org.eclipse.epp.package.jee.product
This is a continuation of log file /home/sumit/workspace/.metadata/.bak_0.log
Created Time: 2014-06-15 14:07:21.872
Error
Sun Jun 15 14:07:21 IST 2014
Problems occurred when invoking code from plug-in: "org.eclipse.ui.navigator".
org.eclipse.core.runtime.CoreException: No property tester contributes a property mapreduce.deployable to type class org.eclipse.core.internal.resources.Project
at org.eclipse.core.internal.expressions.TypeExtensionManager.getProperty(TypeExtensionManager.java:123)
at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:96)
at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)
at org.eclipse.core.internal.expressions.AdaptExpression.evaluate(AdaptExpression.java:91)
at org.eclipse.core.internal.expressions.CompositeExpression.evaluateOr(CompositeExpression.java:68)
at org.eclipse.core.internal.expressions.OrExpression.evaluate(OrExpression.java:21)
at org.eclipse.ui.internal.navigator.NavigatorPlugin$Evaluator.run(NavigatorPlugin.java:245)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.navigator.CustomAndExpression.evaluate(CustomAndExpression.java:71)
at org.eclipse.ui.internal.navigator.NavigatorPlugin$Evaluator.run(NavigatorPlugin.java:245)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.navigator.NavigatorPlugin.safeEvaluate(NavigatorPlugin.java:260)
at org.eclipse.ui.internal.navigator.extensions.NavigatorContentDescriptor.isTriggerPoint(NavigatorContentDescriptor.java:426)
at org.eclipse.ui.internal.navigator.extensions.NavigatorContentDescriptorManager.findDescriptors(NavigatorContentDescriptorManager.java:236)
at org.eclipse.ui.internal.navigator.extensions.NavigatorContentDescriptorManager.findDescriptorsForTriggerPoint(NavigatorContentDescriptorManager.java:187)
at org.eclipse.ui.internal.navigator.NavigatorContentService.findDescriptorsByTriggerPoint(NavigatorContentService.java:805)
at org.eclipse.ui.internal.navigator.NavigatorContentService.findContentExtensionsByTriggerPoint(NavigatorContentService.java:654)
at org.eclipse.ui.internal.navigator.NavigatorContentService.findContentExtensionsByTriggerPoint(NavigatorContentService.java:635)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.hasChildren(NavigatorContentServiceContentProvider.java:377)
at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.hasChildren(NavigatorContentServiceContentProvider.java:422)
at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2138)
at org.eclipse.jface.viewers.TreeViewer.isExpandable(TreeViewer.java:588)
at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2176)
at org.eclipse.jface.viewers.AbstractTreeViewer.optionallyPruneChildren(AbstractTreeViewer.java:2808)
at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2608)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1923)
at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1930)
at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1898)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1855)
at org.eclipse.ui.navigator.CommonViewer.internalRefresh(CommonViewer.java:561)
at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1535)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1443)
at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1404)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1533)
at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:548)
at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:353)
at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:510)
at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1465)
at org.eclipse.ui.internal.navigator.resources.actions.WorkingSetActionProvider.setWorkingSet(WorkingSetActionProvider.java:310)
at org.eclipse.ui.internal.navigator.resources.actions.WorkingSetActionProvider.initWorkingSetFilter(WorkingSetActionProvider.java:252)
at org.eclipse.ui.internal.navigator.resources.actions.WorkingSetActionProvider$4.run(WorkingSetActionProvider.java:340)
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:3529)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3182)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1022)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:916)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:585)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:540)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
at org.eclipse.equinox.launcher.Main.run(Main.java:1438)

Answer 1

You probably switched Perspective. Go to Window -> Open Perspective -> Other and choose Map/Reduce. This should also bring you back DFS Locations.