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I have installed above HEAD version of code recommenders according to this http://wiki.eclipse.org/Recommenders/TechTalk documentation. I get NPEs most of the time no matter what I do when using the Demo Workspace….. Whenever the ExtDoc is shown somewhere this error occurs: java.lang.NullPointerException at java.security.MessageDigest.update(MessageDigest.java:293) at java.security.MessageDigest.digest(MessageDigest.java:368) at java.util.UUID.nameUUIDFromBytes(UUID.java:184) at org.eclipse.recommenders.rcp.utils.UUIDHelper.generateUUIDFromMacAddress(UUIDHelper.java:61) at org.eclipse.recommenders.rcp.utils.UUIDHelper.generateGlobalUUID(UUIDHelper.java:47) at org.eclipse.recommenders.rcp.utils.UUIDHelper.getUUID(UUIDHelper.java:27) at org.eclipse.recommenders.internal.server.extdoc.UserFeedback.getRatingSummary(UserFeedback.java:57) at org.eclipse.recommenders.rcp.extdoc.features.StarsRatingComposite.<init>(StarsRatingComposite.java:50) at org.eclipse.recommenders.rcp.extdoc.features.CommunityFeedback.loadStarsRatingComposite(CommunityFeedback.java:93) at org.eclipse.recommenders.internal.rcp.extdoc.providers.JavadocProvider$1.run(JavadocProvider.java:105) at org.eclipse.recommenders.rcp.extdoc.ProviderUiJob$1.runInUIThread(ProviderUiJob.java:40) at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:95) 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:3935) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3612) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
It seems that networkinterface.getHardwareAddress() returned null. I did expect that every network device would return a non-null value. It seems like that the user running Eclipse does not have the privileges to read the MAC. This is hard to reproduce. I added several null checks and fallbacks and hope that this issue is gone now. The fix is available in HEAD and will probably propagated to DEV in a few hours.
strange why I get that and you don't since we have just about the same Macs and I am also admin there. Anyhow, the updated build now works….Thanks for the quick fix
Closing this issue. Please give latest dev build (v0.5) a try: http://download.eclipse.org/recommenders/updates/dev/e37/ http://download.eclipse.org/recommenders/updates/dev/e42/
