https://bugzilla.redhat.com/show_bug.cgi?id=1314319
--- Comment #1 from Roland Grunberg rgrunber@redhat.com --- I see the same thing.
!SESSION 2016-03-15 16:22:36.107 ----------------------------------------------- eclipse.buildId=4.5.1.v20160217-0100 java.version=1.8.0_72 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Command-line arguments: -data file:/home/me/workspace/ -os linux -ws gtk -arch x86_64
!ENTRY net.sf.eclipsecs.core 4 0 2016-03-15 16:22:48.152 !MESSAGE Checkstyle-Plugin: Plug-in "net.sf.eclipsecs.core" was unable to instantiate class "net.sf.eclipsecs.core.projectconfig.filters.NonSrcDirsFilter". !STACK 1 org.eclipse.core.runtime.CoreException: Plug-in "net.sf.eclipsecs.core" was unable to instantiate class "net.sf.eclipsecs.core.projectconfig.filters.NonSrcDirsFilter". at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.throwException(RegistryStrategyOSGI.java:194) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:188) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55) at net.sf.eclipsecs.core.projectconfig.PluginFilters.<clinit>(PluginFilters.java:102) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.createDefaultProjectConfiguration(ProjectConfigurationFactory.java:142) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.loadFromPersistence(ProjectConfigurationFactory.java:165) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.getConfiguration(ProjectConfigurationFactory.java:81) at net.sf.eclipsecs.core.jobs.RunCheckstyleOnFilesJob.runInWorkspace(RunCheckstyleOnFilesJob.java:111) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NoClassDefFoundError: org/eclipse/jdt/core/JavaModelException at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) at java.lang.Class.getConstructor0(Class.java:3075) at java.lang.Class.newInstance(Class.java:412) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:184) ... 10 more Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.core.JavaModelException cannot be found by net.sf.eclipsecs.core_6.5.0.201506170515 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:389) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 15 more !SUBENTRY 1 org.eclipse.equinox.registry 4 1 2016-03-15 16:22:48.153 !MESSAGE Plug-in "net.sf.eclipsecs.core" was unable to instantiate class "net.sf.eclipsecs.core.projectconfig.filters.NonSrcDirsFilter". !STACK 0 java.lang.NoClassDefFoundError: org/eclipse/jdt/core/JavaModelException at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671) at java.lang.Class.getConstructor0(Class.java:3075) at java.lang.Class.newInstance(Class.java:412) at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:184) at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:905) at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243) at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:55) at net.sf.eclipsecs.core.projectconfig.PluginFilters.<clinit>(PluginFilters.java:102) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.createDefaultProjectConfiguration(ProjectConfigurationFactory.java:142) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.loadFromPersistence(ProjectConfigurationFactory.java:165) at net.sf.eclipsecs.core.projectconfig.ProjectConfigurationFactory.getConfiguration(ProjectConfigurationFactory.java:81) at net.sf.eclipsecs.core.jobs.RunCheckstyleOnFilesJob.runInWorkspace(RunCheckstyleOnFilesJob.java:111) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.core.JavaModelException cannot be found by net.sf.eclipsecs.core_6.5.0.201506170515 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:389) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 15 more
!ENTRY org.eclipse.core.jobs 4 2 2016-03-15 16:22:48.186 !MESSAGE An internal error occurred during: "Checking files...". !STACK 0 java.lang.NoClassDefFoundError: org/eclipse/jdt/core/JavaModelException at net.sf.eclipsecs.core.builder.CheckerFactory.<clinit>(CheckerFactory.java:91) at net.sf.eclipsecs.core.builder.Auditor.runAudit(Auditor.java:142) at net.sf.eclipsecs.core.builder.CheckstyleBuilder.handleBuildSelection(CheckstyleBuilder.java:300) at net.sf.eclipsecs.core.jobs.RunCheckstyleOnFilesJob.runInWorkspace(RunCheckstyleOnFilesJob.java:116) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.ClassNotFoundException: org.eclipse.jdt.core.JavaModelException cannot be found by net.sf.eclipsecs.core_6.5.0.201506170515 at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:389) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352) at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344) at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 6 more
Looks like something is going wrong in the static initializers are failing.