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For input string: ""
java.lang.NumberFormatException: For input string: ""	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)	at java.lang.Long.parseLong(Long.java:424)	at java.lang.Long.parseLong(Long.java:461)	at java.text.DigitList.getLong(DigitList.java:167)	at java.text.DecimalFormat.parse(DecimalFormat.java:1271)	at java.text.SimpleDateFormat.subParse(SimpleDateFormat.java:1375)	at java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1124)	at java.text.DateFormat.parse(DateFormat.java:333)	at org.eclipse.mylyn.internal.context.core.SaxContextContentHandler.createEventFromAttributes(SaxContextContentHandler.java:82)	at org.eclipse.mylyn.internal.context.core.SaxContextContentHandler.startElement(SaxContextContentHandler.java:62)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)	at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:220)	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:322)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1693)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1242)	at org.eclipse.mylyn.internal.context.core.SaxContextReader.readContext(SaxContextReader.java:59)	at org.eclipse.mylyn.internal.context.core.InteractionContextExternalizer.readContextFromXML(InteractionContextExternalizer.java:132)	at org.eclipse.mylyn.internal.context.core.InteractionContextExternalizer.readContextFromXML(InteractionContextExternalizer.java:121)	at org.eclipse.mylyn.internal.context.core.InteractionContextManager.loadActivityMetaContext(InteractionContextManager.java:140)	at org.eclipse.mylyn.internal.context.core.InteractionContextManager.getActivityMetaContext(InteractionContextManager.java:132)	at org.eclipse.mylyn.internal.context.core.InteractionContextManager.processActivityMetaContextEvent(InteractionContextManager.java:177)	at org.eclipse.mylyn.internal.monitor.ui.ShellLifecycleListener.(ShellLifecycleListener.java:35)	at org.eclipse.mylyn.monitor.ui.MonitorUiPlugin$2.run(MonitorUiPlugin.java:110)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3214)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2958)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)	at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:585)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:508)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)	at org.eclipse.equinox.launcher.Main.run(Main.java:1173)	at org.eclipse.equinox.launcher.Main.main(Main.java:1148)