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From Praveen Sripati <praveensrip...@gmail.com>
Subject Eclipse Hadoop Plugin Error creating "New Hadoop location ...."
Date Mon, 30 May 2011 12:51:26 GMT
Hi,

I am trying to run Hadoop from Eclipse using the Eclipse Hadoop Plugin and
stuck with the following problem.

First copied the hadoop-0.21.0-eclipse-plugin.jar to the Eclipse Plugin
folder, started eclipse and switched to the Map/Reduce perspective. In the
"Map/Reduce Locations View" when I try to add a "New Hadoop location ...."
the following error appears in the Eclipse Error Log. The version of Eclipse
is Helios Service Release 2.

    Message : Unhandled event loop exception

    Exception Stack Trace :

    java.lang.NoClassDefFoundError: org/apache/hadoop/conf/Configuration
at
org.apache.hadoop.eclipse.server.HadoopServer.<init>(HadoopServer.java:223)
at
org.apache.hadoop.eclipse.servers.HadoopLocationWizard.<init>(HadoopLocationWizard.java:88)
at
org.apache.hadoop.eclipse.actions.NewLocationAction$1.<init>(NewLocationAction.java:41)
at
org.apache.hadoop.eclipse.actions.NewLocationAction.run(NewLocationAction.java:40)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at
org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at
org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at
org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at
org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
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:369)
at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.conf.Configuration
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:506)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 32 more

When I used the hadoop-0.20.2-eclipse-plugin.jar and
hadoop-eclipse-plugin-0.20.203.0.jar, none of the views appear in the
Map/Reduce perspective and also there are no corresponding view in the
"Windows -> Show View -> Other ...." also.

Thanks,
Praveen

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