java.lang.NullPointerException
   at org.eclipse.core.internal.net.ProxyManager.getPluggedInAuthenticator(ProxyManager.java:390)
   at org.eclipse.core.internal.net.ProxyManager.registerAuthenticator(ProxyManager.java:383)
   at org.eclipse.core.internal.net.ProxyManager.initialize(ProxyManager.java:284)
   at org.eclipse.core.internal.net.Activator.start(Activator.java:179)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
Caused: org.osgi.framework.BundleException: Exception in org.eclipse.core.internal.net.Activator.start() of bundle org.eclipse.core.net.
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
   at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:299)
   at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:440)
   at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:268)
Caused: org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundException: An error occurred while automatically activating bundle org.eclipse.core.net (24).
   at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:122)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:462)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
   at org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:400)
   at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:476)
   at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:429)
   at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:417)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
   at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:345)
   at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:229)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1207)
   at org.netbeans.core.netigso.NetigsoLoader.doLoadClass(NetigsoLoader.java:104)
   at org.netbeans.NetigsoModule$DelegateCL.doLoadClass(NetigsoModule.java:250)
   at org.netbeans.ProxyClassLoader.selfLoadClass(ProxyClassLoader.java:300)
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:227)
   at org.netbeans.ModuleManager$SystemClassLoader.loadClass(ModuleManager.java:713)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
   at org.netbeans.lib.uihandler.LogFormatter.printFrame(LogFormatter.java:155)
   at org.netbeans.lib.uihandler.LogFormatter.printCause(LogFormatter.java:210)
   at org.netbeans.lib.uihandler.LogFormatter.printThrown(LogFormatter.java:233)
   at org.netbeans.lib.uihandler.LogFormatter.format(LogFormatter.java:343)
   at org.netbeans.lib.uihandler.LogRecords.write(LogRecords.java:88)
   at org.netbeans.modules.uihandler.Installer.writeOut(Installer.java:421)
   at org.netbeans.modules.uihandler.UIHandler$2WriteOut.run(UIHandler.java:157)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)
Caused: java.lang.NoClassDefFoundError: org/eclipse/core/net/proxy/IProxyService
   at org.eclipse.mylyn.internal.commons.net.CommonsNetPlugin.start(CommonsNetPlugin.java:91)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
Caused: org.osgi.framework.BundleException: Exception in org.eclipse.mylyn.internal.commons.net.CommonsNetPlugin.start() of bundle org.eclipse.mylyn.commons.net.
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:734)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
   at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:389)
   at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1131)
   at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
   at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
   at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
   at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
   at org.eclipse.osgi.framework.internal.core.EquinoxLauncher.internalStart(EquinoxLauncher.java:271)
   at org.eclipse.osgi.framework.internal.core.EquinoxLauncher.start(EquinoxLauncher.java:241)
   at org.eclipse.osgi.launch.Equinox.start(Equinox.java:258)
   at org.netbeans.core.netigso.Netigso.start(Netigso.java:187)
   at org.netbeans.NetigsoHandle.startFramework(NetigsoHandle.java:196)
   at org.netbeans.ModuleManager.enable(ModuleManager.java:1180)
   at org.netbeans.ModuleManager.enable(ModuleManager.java:1002)
   at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:340)
   at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:276)
   at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:296)
   at org.netbeans.core.startup.Main.getModuleSystem(Main.java:169)
   at org.netbeans.core.startup.Main.start(Main.java:305)
   at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:123)
   at java.lang.Thread.run(Thread.java:722)