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Created attachment 226232 [details] Screenshot of dialog when Eclipse application is not found Build ID: I20130128-0800 (Kepler 4.3m5 pre) CQ:WIND00392998 It sometimes happens for us that p2 does not properly find all registered extension locations. Then the "application" that we start Eclipse with can not be found anywhere. This is easy to simulate by editing configuration/config.ini and specifying eg eclipse.application=org.eclipse.foo.ide.workbench Running eclipse.exe brings up attached dialog, which points to the problem but is not user-friendly: "An error has occurred. See the log file D:\..." - Instead of pointing to the log file (which can't even be copied-and-pasted), it should display the error/log contents in the dialog itself, or provide a button that helps opening the log in an editor. A better error message would read, for instance: "Fatal error launching Eclipse: The Application "org.eclipse.foo.ide.workbench" could not be found in the registry. For more details, see the log file D:\eclipse\configuration\12345667890.log"
I just got hit by this when switching from Eclipse IDE for Java Developers to Eclipse Standard/SDK but I didn't even see an error dialog. Standard installed and restarted without a hitch, but after uninstalling Eclipse IDE for Java Developers feature the restart didn't bring Eclipse back. Now Eclipse doesn't start anymore or show any UI or print anything usable to console. When running eclipsec.exe -debug the only clue that's left is a eclipse\configuration\138228533131.log: !SESSION 2013-10-31 16:08:53.068 ----------------------------------------------- eclipse.buildId=4.4.0.I20130918-2000 java.version=1.7.0_45 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US Command-line arguments: -os win32 -ws win32 -arch x86 -debug !ENTRY org.eclipse.osgi 4 0 2013-10-31 16:08:53.646 !MESSAGE Application error !STACK 1 java.lang.RuntimeException: Application "" could not be found in the registry. The applications available are: org.eclipse.ant.core.antRunner, org.eclipse.ant.ui.antRunner, org.eclipse.e4.ui.workbench.swt.E4Application, org.eclipse.e4.ui.workbench.swt.GenTopic, org.eclipse.equinox.app.error, org.eclipse.equinox.p2.director, org.eclipse.equinox.p2.garbagecollector.application, org.eclipse.equinox.p2.publisher.InstallPublisher, org.eclipse.equinox.p2.publisher.EclipseGenerator, org.eclipse.equinox.p2.publisher.ProductPublisher, org.eclipse.equinox.p2.publisher.FeaturesAndBundlesPublisher, org.eclipse.equinox.p2.reconciler.application, org.eclipse.equinox.p2.repository.repo2runnable, org.eclipse.equinox.p2.repository.metadataverifier, org.eclipse.equinox.p2.artifact.repository.mirrorApplication, org.eclipse.equinox.p2.metadata.repository.mirrorApplication, org.eclipse.equinox.p2.updatesite.UpdateSitePublisher, org.eclipse.equinox.p2.publisher.UpdateSitePublisher, org.eclipse.equinox.p2.publisher.CategoryPublisher, org.eclipse.help.base.infocenterApplication, org.eclipse.help.base.helpApplication, org.eclipse.help.base.indexTool, org.eclipse.jdt.apt.core.aptBuild, org.eclipse.jdt.core.JavaCodeFormatter, org.eclipse.jdt.core.JavaIndexer, org.eclipse.ui.ide.workbench, org.eclipse.pde.build.Build, org.eclipse.emf.codegen.CodeGen, org.eclipse.emf.codegen.JMerger, org.eclipse.emf.codegen.ecore.Generator, org.eclipse.emf.mwe.core.WorkflowRunner, org.eclipse.pde.junit.runtime.uitestapplication, org.eclipse.pde.junit.runtime.legacytestapplication, org.eclipse.pde.junit.runtime.coretestapplication, org.eclipse.pde.junit.runtime.coretestapplicationnonmain, org.eclipse.pde.junit.runtime.nonuithreadtestapplication. at org.eclipse.equinox.internal.app.EclipseAppContainer.startDefaultApp(EclipseAppContainer.java:248) at org.eclipse.equinox.internal.app.MainApplicationLauncher.run(MainApplicationLauncher.java:29) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:109) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:80) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:372) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:226) 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:636) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
Making the following changes brought the installation back. In configuration\config.ini replace: eclipse.p2.profile=epp.package.java osgi.instance.area.default= eclipse.product= eclipse.application= with: eclipse.p2.profile=epp.package.standard osgi.instance.area.default=@user.home/workspace eclipse.product=org.eclipse.platform.ide eclipse.application=org.eclipse.ui.ide.workbench In eclipse.ini add: -product org.eclipse.epp.package.standard.product --launcher.defaultAction openFile --launcher.XXMaxPermSize 256M and update: -vmargs -Dosgi.requiredJavaVersion=1.6 -Xms40m -Xmx512m These came from comparing with a working Eclipse Standard instance.
