java - Error while running a basic wordcount program on Eclipse -

let me inform beginner in hadoop domain. so, referring https://developer.yahoo.com/hadoop/tutorial/module3.html tutorial. completed set , copied codes eclipse map-reduce project. no error showing far wordcountmapper,wordcountreducer , wordcount.java files concerned.

now, when click on run on hadoop , select set server on vm player , click next, nothing happens afterwards. same "run on hadoop selected server page" stays stucked. progress information panel comes shorter span, can't check says actually.

however, @ log files every time after completing these steps. please me out. struggling since last 2 days. far required libraries go, have added required .jar files hadoop installation path.

.log file contents ---

!entry org.eclipse.ui 4 0 2015-05-31 16:56:39.849 !message unhandled event loop exception !stack 0 java.lang.classcastexception: org.eclipse.swt.widgets.table cannot cast org.eclipse.swt.widgets.tablecolumn     @ org.eclipse.swt.widgets.table.getcolumn(table.java:766)     @ org.eclipse.swt.widgets.table.releasechildren(table.java:1532)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.composite.releasechildren(composite.java:840)     @ org.eclipse.swt.widgets.canvas.releasechildren(canvas.java:120)     @ org.eclipse.swt.widgets.decorations.releasechildren(decorations.java:501)     @ org.eclipse.swt.widgets.shell.releasechildren(shell.java:932)     @ org.eclipse.swt.widgets.widget.release(widget.java:816)     @ org.eclipse.swt.widgets.widget.dispose(widget.java:445)     @ org.eclipse.swt.widgets.decorations.dispose(decorations.java:282)     @ org.eclipse.swt.widgets.shell.dispose(shell.java:566)     @ org.eclipse.jface.window.window.close(window.java:330)     @ org.eclipse.jface.dialogs.dialog.close(dialog.java:971)     @ org.eclipse.jface.dialogs.traydialog.close(traydialog.java:143)     @ org.eclipse.jface.wizard.wizarddialog.hardclose(wizarddialog.java:797)     @ org.eclipse.jface.wizard.wizarddialog.close(wizarddialog.java:427)     @ org.eclipse.jface.wizard.wizarddialog.cancelpressed(wizarddialog.java:414)     @ org.eclipse.jface.wizard.wizarddialog$1.widgetselected(wizarddialog.java:293)     @ org.eclipse.swt.widgets.typedlistener.handleevent(typedlistener.java:227)     @ org.eclipse.swt.widgets.eventtable.sendevent(eventtable.java:66)     @ org.eclipse.swt.widgets.widget.sendevent(widget.java:1006)     @ org.eclipse.swt.widgets.display.rundeferredevents(display.java:2413)     @ org.eclipse.swt.widgets.display.readanddispatch(display.java:2164)     @ org.eclipse.jface.window.window.runeventloop(window.java:820)     @ org.eclipse.jface.window.window.open(window.java:796)     @ org.apache.hadoop.eclipse.launch.hadoopapplicationlaunchshortcut.findlaunchconfiguration(hadoopapplicationlaunchshortcut.java:110)     @ org.eclipse.jdt.internal.debug.ui.launcher.javalaunchshortcut.launch(javalaunchshortcut.java:109)     @ org.eclipse.jdt.internal.debug.ui.launcher.javalaunchshortcut.searchandlaunch(javalaunchshortcut.java:74)     @ org.eclipse.jdt.internal.debug.ui.launcher.javalaunchshortcut.launch(javalaunchshortcut.java:227)     @ org.eclipse.debug.internal.ui.launchconfigurations.launchshortcutextension.launch(launchshortcutextension.java:429)     @ org.eclipse.debug.internal.ui.actions.launchshortcutaction.run(launchshortcutaction.java:66)     @ org.eclipse.jface.action.action.runwithevent(action.java:498)     @ org.eclipse.jface.action.actioncontributionitem.handlewidgetselection(actioncontributionitem.java:546)     @ org.eclipse.jface.action.actioncontributionitem.access$2(actioncontributionitem.java:490)     @ org.eclipse.jface.action.actioncontributionitem$5.handleevent(actioncontributionitem.java:402)     @ org.eclipse.swt.widgets.eventtable.sendevent(eventtable.java:66)     @ org.eclipse.swt.widgets.widget.sendevent(widget.java:1006)     @ org.eclipse.swt.widgets.display.rundeferredevents(display.java:2413)     @ org.eclipse.swt.widgets.display.readanddispatch(display.java:2164)     @ org.eclipse.ui.internal.workbench.runeventloop(workbench.java:2389)     @ org.eclipse.ui.internal.workbench.runui(workbench.java:2353)     @ org.eclipse.ui.internal.workbench.access$4(workbench.java:2219)     @ org.eclipse.ui.internal.workbench$4.run(workbench.java:466)     @ org.eclipse.core.databinding.observable.realm.runwithdefault(realm.java:289)     @ org.eclipse.ui.internal.workbench.createandrunworkbench(workbench.java:461)     @ org.eclipse.ui.platformui.createandrunworkbench(platformui.java:149)     @ org.eclipse.ui.internal.ide.application.ideapplication.start(ideapplication.java:106)     @ org.eclipse.equinox.internal.app.eclipseapphandle.run(eclipseapphandle.java:169)     @ org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.runapplication(eclipseapplauncher.java:106)     @ org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.start(eclipseapplauncher.java:76)     @ org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:363)     @ org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:176)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     @ java.lang.reflect.method.invoke(unknown source)     @ org.eclipse.equinox.launcher.main.invokeframework(main.java:508)     @ org.eclipse.equinox.launcher.main.basicrun(main.java:447)     @ org.eclipse.equinox.launcher.main.run(main.java:1173) 

that error doesn't seem related hadoop. couldn't find reference swt table or column in page also.

you start normal java application see if it's working ok, , after run wordcount ($hadoop_home/share/hadoop/mapreduce/hadoop-mapreduce-examples) terminal, test hadoop instalation. after should come eclipse see if it's working (in hadoop there less problems running things terminal instead of doing directly eclipse)