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java.lang.LinkageError: loader constraint violation: loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) previously initiated loading for a different type with name "org/eclipse/jface/preference/IPreferenceStore"	at org.springframework.ide.eclipse.beans.core.BeansCorePlugin.start(BeansCorePlugin.java:125)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)	at java.security.AccessController.doPrivileged(Native Method)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:280)	at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:408)	at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:111)	at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:449)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:211)	at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:381)	at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:457)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)	at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:398)	at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)	at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:326)	at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:231)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1193)	at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:160)	at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:874)	at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)	at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)	at org.springframework.ide.eclipse.core.project.ProjectBuilderDefinition.init(ProjectBuilderDefinition.java:132)	at org.springframework.ide.eclipse.core.project.ProjectBuilderDefinition.(ProjectBuilderDefinition.java:67)	at org.springframework.ide.eclipse.core.project.ProjectBuilderDefinitionFactory.getProjectBuilderDefinitions(ProjectBuilderDefinitionFactory.java:44)	at org.springframework.ide.eclipse.core.internal.project.SpringProjectContributionManager.build(SpringProjectContributionManager.java:75)	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)