This page investigates how to start with Scala using Eclipse
First you need to have Eclipse installed on your computer, for information about Eclipse and how I installed it see this page.
(I am using opensuse 15.4 and I installed Eclipse using the new oomph install)
| My attempts to install scala have failed and corrupted my Eclipse installation. Now every time I start Eclipse it crashes with this error 'An error has occurred' immediately after I select the workspace. The log is at the bottom of this page. |  |
The following is what I did to attempt to install scala:
| First I went to Marketplace within Eclipse. I looked for scala but could not find it. |  |
I then went to the marketplace website and found scala here: https://marketplace.eclipse.org/content/scala-ide. I then dragged the install button to the marketplace window in Eclipse (above).
Eclipse then brought up this dialog. I left the default selections:
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| The next dialog screen said the 'Scala Search' would not be installed. |  |
After confirming this I was asked to confirm the terms and conditions which I did.
There was then another dialog box which said I need to restart eclipse for this to take effect.
So I restarted Eclipse.
after selecting workspace I get error: 'An error has occurred' This happens every time I attempt to start eclipse. |
|
Here is the log file:
!SESSION 2022-07-28 18:52:00.339 ----------------------------------------------- eclipse.buildId=4.24.0.I20220607-0700 java.version=11.0.15 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB Framework arguments: -product org.eclipse.epp.package.java.product Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.java.product !ENTRY org.eclipse.osgi 4 0 2022-07-28 18:52:06.110 !MESSAGE An error occurred while automatically activating bundle org.eclipse.core.resources (77). !STACK 0 org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources. at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:839) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:767) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1032) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:371) at org.eclipse.osgi.container.Module.doStart(Module.java:605) at org.eclipse.osgi.container.Module.start(Module.java:468) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:513) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:41) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:496) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:153) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) at org.eclipse.equinox.launcher.Main.main(Main.java:1440) Caused by: org.aspectj.weaver.BCException: Unable to find Asm for stackmap generation (Looking for 'aj.org.objectweb.asm.ClassReader'). Stackmap generation for woven code is required to avoid verify errors on a Java 1.7 or higher runtime when weaving type org.eclipse.core.resources.IProject when weaving classes when weaving at org.aspectj.weaver.bcel.LazyClassGen.getJavaClassBytesIncludingReweavable(LazyClassGen.java:703) at org.aspectj.weaver.bcel.BcelWeaver.getClassFilesFor(BcelWeaver.java:1443) at org.aspectj.weaver.bcel.BcelWeaver.weaveAndNotify(BcelWeaver.java:1405) at org.aspectj.weaver.bcel.BcelWeaver.weave(BcelWeaver.java:1183) at org.aspectj.weaver.tools.WeavingAdaptor.getWovenBytes(WeavingAdaptor.java:527) at org.aspectj.weaver.tools.WeavingAdaptor.weaveClass(WeavingAdaptor.java:363) at org.eclipse.equinox.weaving.aspectj.loadtime.OSGiWeavingAdaptor.weaveClass(OSGiWeavingAdaptor.java:276) at org.eclipse.equinox.weaving.aspectj.AspectJWeavingService.preProcess(AspectJWeavingService.java:154) at org.eclipse.equinox.weaving.adaptors.WeavingAdaptor.weaveClass(WeavingAdaptor.java:238) at org.eclipse.equinox.weaving.hooks.WeavingHook.processClass(WeavingHook.java:164) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.processClass(ClasspathManager.java:735) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:693) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:639) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:607) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:587) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:566) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:500) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:1) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:943) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:1) at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:321) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:264) at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:499) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:818) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:1) at java.base/java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:810) ... 29 more Root exception: org.aspectj.weaver.BCException: Unable to find Asm for stackmap generation (Looking for 'aj.org.objectweb.asm.ClassReader'). Stackmap generation for woven code is required to avoid verify errors on a Java 1.7 or higher runtime when weaving type org.eclipse.core.resources.IProject when weaving classes when weaving at org.aspectj.weaver.bcel.LazyClassGen.getJavaClassBytesIncludingReweavable(LazyClassGen.java:703) at org.aspectj.weaver.bcel.BcelWeaver.getClassFilesFor(BcelWeaver.java:1443) at org.aspectj.weaver.bcel.BcelWeaver.weaveAndNotify(BcelWeaver.java:1405) at org.aspectj.weaver.bcel.BcelWeaver.weave(BcelWeaver.java:1183) at org.aspectj.weaver.tools.WeavingAdaptor.getWovenBytes(WeavingAdaptor.java:527) at org.aspectj.weaver.tools.WeavingAdaptor.weaveClass(WeavingAdaptor.java:363) at org.eclipse.equinox.weaving.aspectj.loadtime.OSGiWeavingAdaptor.weaveClass(OSGiWeavingAdaptor.java:276) at org.eclipse.equinox.weaving.aspectj.AspectJWeavingService.preProcess(AspectJWeavingService.java:154) at org.eclipse.equinox.weaving.adaptors.WeavingAdaptor.weaveClass(WeavingAdaptor.java:238) at org.eclipse.equinox.weaving.hooks.WeavingHook.processClass(WeavingHook.java:164) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.processClass(ClasspathManager.java:735) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:693) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:639) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:607) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:587) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:566) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:500) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:1) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:943) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:1) at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:321) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:264) at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:499) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:818) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:1) at java.base/java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:810) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:767) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1032) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:371) at org.eclipse.osgi.container.Module.doStart(Module.java:605) at org.eclipse.osgi.container.Module.start(Module.java:468) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:513) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:41) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:496) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:153) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) at org.eclipse.equinox.launcher.Main.main(Main.java:1440) !ENTRY org.eclipse.osgi 4 0 2022-07-28 18:52:06.124 !MESSAGE Application error !STACK 1 java.lang.NoClassDefFoundError: org/eclipse/core/resources/IContainer at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:153) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) at org.eclipse.equinox.launcher.Main.run(Main.java:1467) at org.eclipse.equinox.launcher.Main.main(Main.java:1440) Caused by: java.lang.ClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.core.resources (77). at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:126) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:570) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.sources.SingleSourcePackage.loadClass(SingleSourcePackage.java:41) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:496) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ... 14 more Caused by: org.osgi.framework.BundleException: Exception in org.eclipse.core.resources.ResourcesPlugin.start() of bundle org.eclipse.core.resources. at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:839) at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:767) at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:1032) at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:371) at org.eclipse.osgi.container.Module.doStart(Module.java:605) at org.eclipse.osgi.container.Module.start(Module.java:468) at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:513) at org.eclipse.osgi.internal.hooks.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:117) ... 22 more Caused by: org.aspectj.weaver.BCException: Unable to find Asm for stackmap generation (Looking for 'aj.org.objectweb.asm.ClassReader'). Stackmap generation for woven code is required to avoid verify errors on a Java 1.7 or higher runtime when weaving type org.eclipse.core.resources.IProject when weaving classes when weaving at org.aspectj.weaver.bcel.LazyClassGen.getJavaClassBytesIncludingReweavable(LazyClassGen.java:703) at org.aspectj.weaver.bcel.BcelWeaver.getClassFilesFor(BcelWeaver.java:1443) at org.aspectj.weaver.bcel.BcelWeaver.weaveAndNotify(BcelWeaver.java:1405) at org.aspectj.weaver.bcel.BcelWeaver.weave(BcelWeaver.java:1183) at org.aspectj.weaver.tools.WeavingAdaptor.getWovenBytes(WeavingAdaptor.java:527) at org.aspectj.weaver.tools.WeavingAdaptor.weaveClass(WeavingAdaptor.java:363) at org.eclipse.equinox.weaving.aspectj.loadtime.OSGiWeavingAdaptor.weaveClass(OSGiWeavingAdaptor.java:276) at org.eclipse.equinox.weaving.aspectj.AspectJWeavingService.preProcess(AspectJWeavingService.java:154) at org.eclipse.equinox.weaving.adaptors.WeavingAdaptor.weaveClass(WeavingAdaptor.java:238) at org.eclipse.equinox.weaving.hooks.WeavingHook.processClass(WeavingHook.java:164) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.processClass(ClasspathManager.java:735) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.defineClass(ClasspathManager.java:693) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findClassImpl(ClasspathManager.java:639) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:607) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClassImpl(ClasspathManager.java:587) at org.eclipse.osgi.internal.loader.classpath.ClasspathManager.findLocalClass(ClasspathManager.java:566) at org.eclipse.osgi.internal.loader.ModuleClassLoader.findLocalClass(ModuleClassLoader.java:335) at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:397) at org.eclipse.osgi.internal.loader.BundleLoader.findClass0(BundleLoader.java:500) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:416) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:168) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:522) at org.eclipse.core.resources.ResourcesPlugin$WorkspaceInitCustomizer.addingService(ResourcesPlugin.java:1) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:943) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:1) at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:321) at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:264) at org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:499) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:818) at org.eclipse.osgi.internal.framework.BundleContextImpl$2.run(BundleContextImpl.java:1) at java.base/java.security.AccessController.doPrivileged(Native Method) at org.eclipse.osgi.internal.framework.BundleContextImpl.startActivator(BundleContextImpl.java:810) ... 29 more