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UI freezes caused by xmlnamespace support? #318

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kdvolder opened this issue Jul 8, 2019 · 14 comments

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@kdvolder
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commented Jul 8, 2019

@wilkinsona Reported that he is seeing long and annoying ui freezes in STS 4. After turning on UI responsiveness monitoring a few stacktraces were collected. At first sight I'd say that the xmlnamespaces resolution mechanism is causing this somehow.

I'm attaching the stacktraces below. Also there are some instructions on setting up a workspace similar to Andy's that may help us reproduce this problem here: https://github.com/spring-projects/spring-boot/blob/master/CONTRIBUTING.adoc#importing-into-eclipse

!SESSION 2019-07-05 15:49:30.205 -----------------------------------------------
eclipse.buildId=4.11.0.I20190307-0500
java.version=1.8.0_201
java.vendor=Oracle Corporation
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_GB
Framework arguments:  -product org.eclipse.epp.package.java.product -keyring /Users/awilkinson/.eclipse_keyring
Command-line arguments:  -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.java.product -keyring /Users/awilkinson/.eclipse_keyring

This is a continuation of log file /Users/awilkinson/dev/workspaces/spring-projects/spring-boot/master/.metadata/.bak_1.log
Created Time: 2019-07-08 20:17:20.319

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:20.319
!MESSAGE ClasspathListenerHandler addClasspathListener sts4.classpath.niqsZKhkisBatched = true

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:20.320
!MESSAGE subscribing to classpath changes: sts4.classpath.niqsZKhk isBatched = true

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:20.320
!MESSAGE Setting up ClasspathListenerManager

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:20.320
!MESSAGE subsribers = {sts4.classpath.niqsZKhk=Send Classpath Notifications(6986)}

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:20.321
!MESSAGE Sending initial event for all projects ...

!ENTRY org.eclipse.ui.monitoring 4 0 2019-07-08 20:17:23.443
!MESSAGE UI freeze of 3.1s at 20:17:20.324
!SUBENTRY 1 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.443
!MESSAGE Sample at 20:17:20.993 (+0.669s)
Thread 'main' tid=1 (WAITING)
!STACK 0
Stack Trace
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:187)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLCatalogIdResolver.resolve(XMLCatalogIdResolver.java:94)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLModelQueryAssociationProvider.resolveGrammarURI(XMLModelQueryAssociationProvider.java:60)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider.resolveGrammarURI(XMLAssociationProvider.java:170)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.lookupOrCreateResolvedURI(CMDocumentManagerImpl.java:124)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.addCMDocumentReference(CMDocumentManagerImpl.java:206)
	at org.eclipse.m2e.editor.xml.PomModelHandler$PomModelQueryAssociationProvider.getCMElementDeclaration(PomModelHandler.java:120)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.ModelQueryImpl.getCMElementDeclaration(ModelQueryImpl.java:118)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getAttributeToShow(XMLContentOutlineConfiguration.java:75)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getText(XMLContentOutlineConfiguration.java:142)
	at org.eclipse.m2e.editor.xml.PomContentOutlineConfiguration$PomLabelProvider.getText(PomContentOutlineConfiguration.java:231)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getText(WrappedViewerLabelProvider.java:99)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:148)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:144)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:946)
	at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:120)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1025)
	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:478)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2160)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:840)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:818)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:604)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:766)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1586)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:780)
	at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$1(AbstractTreeViewer.java:1571)
	at org.eclipse.jface.viewers.AbstractTreeViewer$$Lambda$333/97394375.run(Unknown Source)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1448)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:363)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1409)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1565)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1686)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setInput(ConfigurableContentOutlinePage.java:696)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setConfiguration(ConfigurableContentOutlinePage.java:607)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.createControl(ConfigurableContentOutlinePage.java:405)
	at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:141)
	at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:378)
	at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:718)
	at org.eclipse.ui.views.contentoutline.ContentOutline.partBroughtToTop(ContentOutline.java:210)
	at org.eclipse.ui.part.PageBookView$1.partBroughtToTop(PageBookView.java:1036)
	at org.eclipse.ui.internal.WorkbenchPage$16.run(WorkbenchPage.java:5323)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.WorkbenchPage.firePartBroughtToTop(WorkbenchPage.java:5320)
	at org.eclipse.ui.internal.WorkbenchPage.access$5(WorkbenchPage.java:5301)
	at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partBroughtToTop(WorkbenchPage.java:221)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$7.run(PartServiceImpl.java:317)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartBroughtToTop(PartServiceImpl.java:314)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.access$4(PartServiceImpl.java:312)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:109)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler$$Lambda$142/146316090.run(Unknown Source)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4976)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:177)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:652)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:616)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1240)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3317)
	at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3216)
	at org.eclipse.ui.internal.WorkbenchPage$$Lambda$745/451111450.run(Unknown Source)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3213)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3177)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3167)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:570)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:525)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:363)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:170)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:287)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:252)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:382)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:554)
	at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:49)
	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1165)
	at org.eclipse.jface.viewers.StructuredViewer$$Lambda$322/294599155.handleOpen(Unknown Source)
	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:277)
	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:312)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4363)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4150)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.ui.internal.Workbench$$Lambda$91/1417854124.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:661)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1476)
!SUBENTRY 1 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.443
!MESSAGE Sample at 20:17:22.164 (+1.171s)
Thread 'main' tid=1 (WAITING)
!STACK 0
Stack Trace
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:187)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLCatalogIdResolver.resolve(XMLCatalogIdResolver.java:94)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLModelQueryAssociationProvider.resolveGrammarURI(XMLModelQueryAssociationProvider.java:60)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider.resolveGrammarURI(XMLAssociationProvider.java:170)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.lookupOrCreateResolvedURI(CMDocumentManagerImpl.java:124)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.addCMDocumentReference(CMDocumentManagerImpl.java:206)
	at org.eclipse.m2e.editor.xml.PomModelHandler$PomModelQueryAssociationProvider.getCMElementDeclaration(PomModelHandler.java:120)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.ModelQueryImpl.getCMElementDeclaration(ModelQueryImpl.java:118)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getAttributeToShow(XMLContentOutlineConfiguration.java:75)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getText(XMLContentOutlineConfiguration.java:142)
	at org.eclipse.m2e.editor.xml.PomContentOutlineConfiguration$PomLabelProvider.getText(PomContentOutlineConfiguration.java:231)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getText(WrappedViewerLabelProvider.java:99)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:148)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:144)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:946)
	at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:120)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1025)
	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:478)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2160)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:840)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:818)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:604)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:766)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1586)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:780)
	at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$1(AbstractTreeViewer.java:1571)
	at org.eclipse.jface.viewers.AbstractTreeViewer$$Lambda$333/97394375.run(Unknown Source)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1448)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:363)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1409)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1565)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1686)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setInput(ConfigurableContentOutlinePage.java:696)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setConfiguration(ConfigurableContentOutlinePage.java:607)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.createControl(ConfigurableContentOutlinePage.java:405)
	at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:141)
	at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:378)
	at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:718)
	at org.eclipse.ui.views.contentoutline.ContentOutline.partBroughtToTop(ContentOutline.java:210)
	at org.eclipse.ui.part.PageBookView$1.partBroughtToTop(PageBookView.java:1036)
	at org.eclipse.ui.internal.WorkbenchPage$16.run(WorkbenchPage.java:5323)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.WorkbenchPage.firePartBroughtToTop(WorkbenchPage.java:5320)
	at org.eclipse.ui.internal.WorkbenchPage.access$5(WorkbenchPage.java:5301)
	at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partBroughtToTop(WorkbenchPage.java:221)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$7.run(PartServiceImpl.java:317)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartBroughtToTop(PartServiceImpl.java:314)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.access$4(PartServiceImpl.java:312)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:109)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler$$Lambda$142/146316090.run(Unknown Source)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4976)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:177)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:652)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:616)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1240)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3317)
	at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3216)
	at org.eclipse.ui.internal.WorkbenchPage$$Lambda$745/451111450.run(Unknown Source)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3213)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3177)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3167)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:570)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:525)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:363)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:170)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:287)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:252)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:382)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:554)
	at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:49)
	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1165)
	at org.eclipse.jface.viewers.StructuredViewer$$Lambda$322/294599155.handleOpen(Unknown Source)
	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:277)
	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:312)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4363)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4150)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.ui.internal.Workbench$$Lambda$91/1417854124.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:661)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1476)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Consume LS error stream' tid=6607 (RUNNABLE)
!STACK 0
Stack Trace
	at java.io.FileInputStream.readBytes(Native Method)
	at java.io.FileInputStream.read(FileInputStream.java:255)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	at java.io.FilterInputStream.read(FilterInputStream.java:107)
	at org.springsource.ide.eclipse.commons.core.util.IOUtil.consume(IOUtil.java:26)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageServerProcessStreamConnector$1.run(STS4LanguageServerProcessStreamConnector.java:64)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor' tid=6606 (WAITING)
Waiting for: java.util.concurrent.FutureTask@5c0f0483
!STACK 0
Stack Trace
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:187)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.validation.ValidatorHelper$MyContentHandler.startElement(ValidatorHelper.java:299)
	at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
	at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.eclipse.wst.xml.core.internal.validation.ValidatorHelper.computeValidationInformation(ValidatorHelper.java:177)
	at org.eclipse.wst.xml.core.internal.validation.XMLValidator.validate(XMLValidator.java:337)
	at org.eclipse.wst.xml.core.internal.validation.eclipse.Validator.validate(Validator.java:95)
	at org.eclipse.wst.xml.core.internal.validation.eclipse.Validator.validate(Validator.java:73)
	at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validate(AbstractNestedValidator.java:281)
	at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validateInJob(AbstractNestedValidator.java:123)
	at org.eclipse.wst.xml.ui.internal.validation.DelegatingSourceValidator.validate(DelegatingSourceValidator.java:244)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ReconcileStepForValidator.validate(ReconcileStepForValidator.java:252)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ReconcileStepForValidator.reconcileModel(ReconcileStepForValidator.java:210)
	at org.eclipse.jface.text.reconciler.AbstractReconcileStep.reconcile(AbstractReconcileStep.java:92)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ValidatorStrategy.reconcile(ValidatorStrategy.java:270)
	at org.eclipse.wst.sse.ui.internal.reconcile.DocumentRegionProcessor.process(DocumentRegionProcessor.java:323)
	at org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor.process(StructuredRegionProcessor.java:260)
	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor$BackgroundThread.run(DirtyRegionProcessor.java:694)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor' tid=6605 (TIMED_WAITING)
Waiting for: java.util.Collections$SynchronizedRandomAccessList@17a9093e
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor$BackgroundThread.run(DirtyRegionProcessor.java:670)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Worker-616: Loading referenced grammars' tid=6568 (RUNNABLE)
!STACK 0
Stack Trace
	at sun.nio.fs.UnixNativeDispatcher.opendir0(Native Method)
	at sun.nio.fs.UnixNativeDispatcher.opendir(UnixNativeDispatcher.java:408)
	at sun.nio.fs.UnixFileSystemProvider.newDirectoryStream(UnixFileSystemProvider.java:402)
	at java.nio.file.Files.newDirectoryStream(Files.java:457)
	at java.nio.file.FileTreeWalker.visit(FileTreeWalker.java:300)
	at java.nio.file.FileTreeWalker.next(FileTreeWalker.java:372)
	at java.nio.file.Files.walkFileTree(Files.java:2706)
	at java.nio.file.Files.walkFileTree(Files.java:2742)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader.fetchResourceFromDirectory(FilteringURLResourceLoader.java:219)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader.buildIndex(FilteringURLResourceLoader.java:171)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader.ensureIndexed(FilteringURLResourceLoader.java:137)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader.getResourcesCollection(FilteringURLResourceLoader.java:102)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader.lambda$1(FilteringURLResourceLoader.java:258)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.FilteringURLResourceLoader$$Lambda$1115/1981295523.get(Unknown Source)
	at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:47)
	at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62)
	at reactor.core.publisher.Flux.subscribe(Flux.java:6877)
	at reactor.core.publisher.FluxConcatArray$ConcatArraySubscriber.onComplete(FluxConcatArray.java:208)
	at reactor.core.publisher.FluxConcatArray.subscribe(FluxConcatArray.java:81)
	at reactor.core.publisher.MonoReduceSeed.subscribe(MonoReduceSeed.java:65)
	at reactor.core.publisher.Mono.block(Mono.java:1182)
	at org.springframework.ide.eclipse.xml.namespaces.classpath.PropertiesLoaderUtils.loadAllProperties(PropertiesLoaderUtils.java:88)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.getSchemaMappings(ProjectClasspathUriResolver.java:201)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.init(ProjectClasspathUriResolver.java:123)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.<init>(ProjectClasspathUriResolver.java:55)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver$1.call(ProjectClasspathExtensibleUriResolver.java:167)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver$1.call(ProjectClasspathExtensibleUriResolver.java:1)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:182)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLCatalogIdResolver.resolve(XMLCatalogIdResolver.java:94)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLModelQueryAssociationProvider.resolveGrammarURI(XMLModelQueryAssociationProvider.java:60)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider.resolveGrammarURI(XMLAssociationProvider.java:170)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.lookupOrCreateResolvedURI(CMDocumentManagerImpl.java:124)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.addCMDocumentReference(CMDocumentManagerImpl.java:206)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader.handleGrammar(CMDocumentLoader.java:226)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader$CMDocumentLoadingNamespaceTable.addElement(CMDocumentLoader.java:301)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader.loadCMDocuments(CMDocumentLoader.java:131)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.InferredGrammarBuildingCMDocumentLoader.loadCMDocuments(InferredGrammarBuildingCMDocumentLoader.java:58)
	at org.eclipse.wst.xml.ui.internal.DOMObserver.invokeCMDocumentLoad(DOMObserver.java:216)
	at org.eclipse.wst.xml.ui.internal.DOMObserver$TimerJob.run(DOMObserver.java:147)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'JavaScript indexing' tid=562 (WAITING)
Waiting for: org.eclipse.wst.jsdt.internal.core.search.indexing.IndexManager@6aa802c4
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.wst.jsdt.internal.core.search.processing.JobManager.run(JobManager.java:370)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Java indexing' tid=35 (WAITING)
Waiting for: org.eclipse.jdt.internal.core.search.indexing.IndexManager@4f672243
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:378)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'EMF Reference Cleaner' tid=20 (WAITING)
Waiting for: java.lang.ref.ReferenceQueue$Lock@21faeda4
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
	at org.eclipse.emf.common.util.CommonUtil$1ReferenceClearingQueuePollingThread.run(CommonUtil.java:70)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Worker-JM' tid=19 (WAITING)
Waiting for: java.util.ArrayList@2415090a
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at org.eclipse.core.internal.jobs.InternalWorker.run(InternalWorker.java:62)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'SCR Component Actor' tid=16 (WAITING)
Waiting for: java.util.LinkedList@3b78c020
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:83)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'pool-30-thread-1' tid=6608 (WAITING)
Waiting for: org.eclipse.swt.widgets.RunnableLock@75709b43
Holding: java.util.concurrent.ThreadPoolExecutor$Worker@1fa4e696
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:253)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4976)
	at org.springframework.tooling.ls.eclipse.commons.ProjectSorter.<init>(ProjectSorter.java:35)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl.lambda$1(STS4LanguageClientImpl.java:98)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl$$Lambda$629/1596428714.get(Unknown Source)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler$Subscriptions.sendInitialEvents(ReusableClasspathListenerHandler.java:80)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler$Subscriptions.subscribe(ReusableClasspathListenerHandler.java:71)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler.addClasspathListener(ReusableClasspathListenerHandler.java:145)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl.addClasspathListener(STS4LanguageClientImpl.java:363)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint$$Lambda$642/220908198.apply(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)
	at org.eclipse.lsp4e.LanguageServerWrapper.lambda$1(LanguageServerWrapper.java:213)
	at org.eclipse.lsp4e.LanguageServerWrapper$$Lambda$639/2094357708.consume(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 1 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Sample at 20:17:22.833 (+0.669s)
Thread 'main' tid=1 (WAITING)
!STACK 0
Stack Trace
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:187)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLCatalogIdResolver.resolve(XMLCatalogIdResolver.java:94)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLModelQueryAssociationProvider.resolveGrammarURI(XMLModelQueryAssociationProvider.java:60)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider.resolveGrammarURI(XMLAssociationProvider.java:170)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.lookupOrCreateResolvedURI(CMDocumentManagerImpl.java:124)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.addCMDocumentReference(CMDocumentManagerImpl.java:206)
	at org.eclipse.m2e.editor.xml.PomModelHandler$PomModelQueryAssociationProvider.getCMElementDeclaration(PomModelHandler.java:120)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.ModelQueryImpl.getCMElementDeclaration(ModelQueryImpl.java:118)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getAttributeToShow(XMLContentOutlineConfiguration.java:75)
	at org.eclipse.wst.xml.ui.views.contentoutline.XMLContentOutlineConfiguration$AttributeShowingLabelProvider.getText(XMLContentOutlineConfiguration.java:142)
	at org.eclipse.m2e.editor.xml.PomContentOutlineConfiguration$PomLabelProvider.getText(PomContentOutlineConfiguration.java:231)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.getText(WrappedViewerLabelProvider.java:99)
	at org.eclipse.jface.viewers.WrappedViewerLabelProvider.update(WrappedViewerLabelProvider.java:148)
	at org.eclipse.jface.viewers.ViewerColumn.refresh(ViewerColumn.java:144)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:946)
	at org.eclipse.jface.viewers.AbstractTreeViewer$UpdateItemSafeRunnable.run(AbstractTreeViewer.java:120)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.AbstractTreeViewer.doUpdateItem(AbstractTreeViewer.java:1025)
	at org.eclipse.jface.viewers.StructuredViewer$UpdateItemSafeRunnable.run(StructuredViewer.java:478)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.updateItem(StructuredViewer.java:2160)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createTreeItem(AbstractTreeViewer.java:840)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:818)
	at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:604)
	at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:766)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1586)
	at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:780)
	at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$1(AbstractTreeViewer.java:1571)
	at org.eclipse.jface.viewers.AbstractTreeViewer$$Lambda$333/97394375.run(Unknown Source)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1448)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:363)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1409)
	at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1565)
	at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:282)
	at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1686)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setInput(ConfigurableContentOutlinePage.java:696)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.setConfiguration(ConfigurableContentOutlinePage.java:607)
	at org.eclipse.wst.sse.ui.internal.contentoutline.ConfigurableContentOutlinePage.createControl(ConfigurableContentOutlinePage.java:405)
	at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:141)
	at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:378)
	at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:718)
	at org.eclipse.ui.views.contentoutline.ContentOutline.partBroughtToTop(ContentOutline.java:210)
	at org.eclipse.ui.part.PageBookView$1.partBroughtToTop(PageBookView.java:1036)
	at org.eclipse.ui.internal.WorkbenchPage$16.run(WorkbenchPage.java:5323)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.WorkbenchPage.firePartBroughtToTop(WorkbenchPage.java:5320)
	at org.eclipse.ui.internal.WorkbenchPage.access$5(WorkbenchPage.java:5301)
	at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partBroughtToTop(WorkbenchPage.java:221)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$7.run(PartServiceImpl.java:317)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartBroughtToTop(PartServiceImpl.java:314)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.access$4(PartServiceImpl.java:312)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$1.handleEvent(PartServiceImpl.java:109)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler$$Lambda$142/146316090.run(Unknown Source)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4976)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:219)
	at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38)
	at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203)
	at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1)
	at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:233)
	at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151)
	at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:132)
	at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75)
	at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44)
	at org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55)
	at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63)
	at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424)
	at org.eclipse.e4.ui.model.application.ui.impl.ElementContainerImpl.setSelectedElement(ElementContainerImpl.java:177)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.showElementInWindow(ModelServiceImpl.java:652)
	at org.eclipse.e4.ui.internal.workbench.ModelServiceImpl.bringToTop(ModelServiceImpl.java:616)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.delegateBringToTop(PartServiceImpl.java:791)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:404)
	at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:1240)
	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:3317)
	at org.eclipse.ui.internal.WorkbenchPage.lambda$9(WorkbenchPage.java:3216)
	at org.eclipse.ui.internal.WorkbenchPage$$Lambda$745/451111450.run(Unknown Source)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3213)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3177)
	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:3167)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:570)
	at org.eclipse.ui.ide.IDE.openEditor(IDE.java:525)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:363)
	at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:170)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:287)
	at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:252)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:274)
	at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:382)
	at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:554)
	at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:49)
	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:853)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.ui.internal.JFaceUtil.lambda$0(JFaceUtil.java:47)
	at org.eclipse.ui.internal.JFaceUtil$$Lambda$9/673412242.run(Unknown Source)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:176)
	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:850)
	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1165)
	at org.eclipse.jface.viewers.StructuredViewer$$Lambda$322/294599155.handleOpen(Unknown Source)
	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:277)
	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:272)
	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:312)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4363)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1512)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1535)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1520)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1324)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4150)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.ui.internal.Workbench$$Lambda$91/1417854124.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:566)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:661)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:597)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1476)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Consume LS error stream' tid=6607 (RUNNABLE)
!STACK 0
Stack Trace
	at java.io.FileInputStream.readBytes(Native Method)
	at java.io.FileInputStream.read(FileInputStream.java:255)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	at java.io.FilterInputStream.read(FilterInputStream.java:107)
	at org.springsource.ide.eclipse.commons.core.util.IOUtil.consume(IOUtil.java:26)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageServerProcessStreamConnector$1.run(STS4LanguageServerProcessStreamConnector.java:64)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor' tid=6606 (WAITING)
Waiting for: java.util.concurrent.FutureTask@5c0f0483
!STACK 0
Stack Trace
	at sun.misc.Unsafe.park(Native Method)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
	at java.util.concurrent.FutureTask.awaitDone(FutureTask.java:429)
	at java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:187)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.validation.ValidatorHelper$MyContentHandler.startElement(ValidatorHelper.java:299)
	at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
	at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.eclipse.wst.xml.core.internal.validation.ValidatorHelper.computeValidationInformation(ValidatorHelper.java:177)
	at org.eclipse.wst.xml.core.internal.validation.XMLValidator.validate(XMLValidator.java:337)
	at org.eclipse.wst.xml.core.internal.validation.eclipse.Validator.validate(Validator.java:95)
	at org.eclipse.wst.xml.core.internal.validation.eclipse.Validator.validate(Validator.java:73)
	at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validate(AbstractNestedValidator.java:281)
	at org.eclipse.wst.xml.core.internal.validation.core.AbstractNestedValidator.validateInJob(AbstractNestedValidator.java:123)
	at org.eclipse.wst.xml.ui.internal.validation.DelegatingSourceValidator.validate(DelegatingSourceValidator.java:244)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ReconcileStepForValidator.validate(ReconcileStepForValidator.java:252)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ReconcileStepForValidator.reconcileModel(ReconcileStepForValidator.java:210)
	at org.eclipse.jface.text.reconciler.AbstractReconcileStep.reconcile(AbstractReconcileStep.java:92)
	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ValidatorStrategy.reconcile(ValidatorStrategy.java:270)
	at org.eclipse.wst.sse.ui.internal.reconcile.DocumentRegionProcessor.process(DocumentRegionProcessor.java:323)
	at org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor.process(StructuredRegionProcessor.java:260)
	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor$BackgroundThread.run(DirtyRegionProcessor.java:694)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor' tid=6605 (TIMED_WAITING)
Waiting for: java.util.Collections$SynchronizedRandomAccessList@17a9093e
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor$BackgroundThread.run(DirtyRegionProcessor.java:670)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Worker-616: Loading referenced grammars' tid=6568 (RUNNABLE)
!STACK 0
Stack Trace
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at javax.xml.parsers.FactoryFinder.getProviderClass(FactoryFinder.java:113)
	at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:188)
	at javax.xml.parsers.FactoryFinder.newInstance(FactoryFinder.java:152)
	at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:277)
	at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:120)
	at org.springsource.ide.eclipse.commons.core.SpringCoreUtils.getDocumentBuilderFactory(SpringCoreUtils.java:368)
	at org.springframework.ide.eclipse.xml.namespaces.util.TargetNamespaceScanner.getTargetNamespace(TargetNamespaceScanner.java:45)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.getTargetNamespace(ProjectClasspathUriResolver.java:183)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.init(ProjectClasspathUriResolver.java:135)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathUriResolver.<init>(ProjectClasspathUriResolver.java:55)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver$1.call(ProjectClasspathExtensibleUriResolver.java:167)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver$1.call(ProjectClasspathExtensibleUriResolver.java:1)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.getProjectResolver(ProjectClasspathExtensibleUriResolver.java:182)
	at org.springframework.ide.eclipse.xml.namespaces.internal.ProjectClasspathExtensibleUriResolver.resolve(ProjectClasspathExtensibleUriResolver.java:111)
	at org.eclipse.wst.common.uriresolver.internal.ExtensibleURIResolver.resolve(ExtensibleURIResolver.java:86)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLCatalogIdResolver.resolve(XMLCatalogIdResolver.java:94)
	at org.eclipse.wst.xml.core.internal.modelquery.XMLModelQueryAssociationProvider.resolveGrammarURI(XMLModelQueryAssociationProvider.java:60)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider.resolveGrammarURI(XMLAssociationProvider.java:170)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.lookupOrCreateResolvedURI(CMDocumentManagerImpl.java:124)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentManagerImpl.addCMDocumentReference(CMDocumentManagerImpl.java:206)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader.handleGrammar(CMDocumentLoader.java:226)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader$CMDocumentLoadingNamespaceTable.addElement(CMDocumentLoader.java:301)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.CMDocumentLoader.loadCMDocuments(CMDocumentLoader.java:131)
	at org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.InferredGrammarBuildingCMDocumentLoader.loadCMDocuments(InferredGrammarBuildingCMDocumentLoader.java:58)
	at org.eclipse.wst.xml.ui.internal.DOMObserver.invokeCMDocumentLoad(DOMObserver.java:216)
	at org.eclipse.wst.xml.ui.internal.DOMObserver$TimerJob.run(DOMObserver.java:147)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'JavaScript indexing' tid=562 (WAITING)
Waiting for: org.eclipse.wst.jsdt.internal.core.search.indexing.IndexManager@6aa802c4
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.wst.jsdt.internal.core.search.processing.JobManager.run(JobManager.java:370)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Java indexing' tid=35 (WAITING)
Waiting for: org.eclipse.jdt.internal.core.search.indexing.IndexManager@4f672243
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:378)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'EMF Reference Cleaner' tid=20 (WAITING)
Waiting for: java.lang.ref.ReferenceQueue$Lock@21faeda4
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
	at org.eclipse.emf.common.util.CommonUtil$1ReferenceClearingQueuePollingThread.run(CommonUtil.java:70)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'Worker-JM' tid=19 (WAITING)
Waiting for: java.util.ArrayList@2415090a
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at org.eclipse.core.internal.jobs.InternalWorker.run(InternalWorker.java:62)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'SCR Component Actor' tid=16 (WAITING)
Waiting for: java.util.LinkedList@3b78c020
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:83)
	at java.lang.Thread.run(Thread.java:748)
!SUBENTRY 2 org.eclipse.ui.monitoring 1 0 2019-07-08 20:17:23.444
!MESSAGE Thread 'pool-30-thread-1' tid=6608 (WAITING)
Waiting for: org.eclipse.swt.widgets.RunnableLock@75709b43
Holding: java.util.concurrent.ThreadPoolExecutor$Worker@1fa4e696
!STACK 0
Stack Trace
	at java.lang.Object.wait(Native Method)
	at java.lang.Object.wait(Object.java:502)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:253)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:147)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4976)
	at org.springframework.tooling.ls.eclipse.commons.ProjectSorter.<init>(ProjectSorter.java:35)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl.lambda$1(STS4LanguageClientImpl.java:98)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl$$Lambda$629/1596428714.get(Unknown Source)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler$Subscriptions.sendInitialEvents(ReusableClasspathListenerHandler.java:80)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler$Subscriptions.subscribe(ReusableClasspathListenerHandler.java:71)
	at org.springframework.tooling.jdt.ls.commons.classpath.ReusableClasspathListenerHandler.addClasspathListener(ReusableClasspathListenerHandler.java:145)
	at org.springframework.tooling.ls.eclipse.commons.STS4LanguageClientImpl.addClasspathListener(STS4LanguageClientImpl.java:363)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint$$Lambda$642/220908198.apply(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:120)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:261)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:190)
	at org.eclipse.lsp4e.LanguageServerWrapper.lambda$1(LanguageServerWrapper.java:213)
	at org.eclipse.lsp4e.LanguageServerWrapper$$Lambda$639/2094357708.consume(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:23.999
!MESSAGE project spring-boot ...

!ENTRY org.springframework.tooling.ls.eclipse.commons 1 0 2019-07-08 20:17:23.999
!MESSAGE Preparing classpath changed notification spring-boot

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kdvolder added a commit to spring-projects/spring-ide that referenced this issue Jul 8, 2019

@spring-issuemaster spring-issuemaster added started and removed unstarted labels Jul 8, 2019

@spring-issuemaster

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commented Jul 8, 2019

(comment in Pivotal Tracker added by Kris De Volder:)

From the stack traces, there are bunch of calls to the namespaces resolver. But the one that is seemingly hanging the ui thread is coming from m2e when doing something with the pom.xml. I beleave the pom.xml should be treated as a special case and skipped since we don't want to resolve spring namespaces definitions from the classpath for pom anyway.

So, I pushed a small change that checks if the current file is 'pom.xml' and just skips it.

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commented Jul 10, 2019

I was about to report on this issue but wasn't sure. But now as you mention it, I can confirm a delay when opening a pom.xml with the "Maven POM Editor" which got introduced "recently".

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commented Jul 10, 2019

@mweirauch That sounds like the same problem yes. If you can try out a nightly build with the attempt at fixing this, and let us know if it solves the issue for you, that would be greatly appreciated.

You can download it from here: http://dist.springsource.com/snapshot/STS4/nightly-distributions.html

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commented Jul 12, 2019

@kdvolder I just tried with `Spring Tool Suite 4 / Version: 4.3.1.CI-B1921 / Build Id: 201907120604" and my "work" workspace, and it takes up to 6 seconds to open a pom.xml with the "Maven POM Editor".

Setup: Fedora30, i7-6820HQ CPU @ 2.70GHz × 8; 32GB RAM

Perhaps related (please let me know if this derails from the main topic):

jps | grep BootLanguagServerBootApp | wc -l
53

All from afformentioned STS4-nightly distribution. Might be due to the many Spring Boot projects in the workspace. Processes were gone when closing STS4.

The delay even feels longer then on my main Eclipse+STS4 installation.
(4.12-nightly some days old; have trouble updating to current setup though).

An error occurred while collecting items to be installed
session context was:(profile=xxx, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/features/org.springframework.boot.ide.main.feature_4.3.1.201907111441-CI-B1919.jar.
https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/features/org.springframework.boot.ide.main.feature_4.3.1.201907111441-CI-B1919.jar
Artifact not found: https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/binary/org.springframework.boot.ide.main.feature_root_4.3.1.201907111441-CI-B1919.
https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/binary/org.springframework.boot.ide.main.feature_root_4.3.1.201907111441-CI-B1919
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commented Jul 12, 2019

Lets try to find the reason step by step here.

The delay even feels longer then on my main Eclipse+STS4 installation.
(4.12-nightly some days old; have trouble updating to current setup though).

The fundamental question here is whether this is related to the Spring Boot language server starting up in the background and occupying the CPU or blocking the UI somehow or if the XML namespace support is in charge here and responsible for the slowness.

To identify this, you can go to the Preferences -> Language Servers and disable the Spring Boot Language Server for the Spring XML Config File content-type. Then restart your IDE and try to open a pom file again. If the behavior different? Or the same?

If it is different (assuming better), then opening a Java file next and observe what happens. If there again any slowness or freeze happening?

An error occurred while collecting items to be installed
session context was:(profile=xxx, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Artifact not found: https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/features/org.springframework.boot.ide.main.feature_4.3.1.201907111441-CI-B1919.jar.
https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/features/org.springframework.boot.ide.main.feature_4.3.1.201907111441-CI-B1919.jar
Artifact not found: https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/binary/org.springframework.boot.ide.main.feature_root_4.3.1.201907111441-CI-B1919.
https://dist.springsource.com/snapshot/TOOLS/sts4/nightly/e4.12/binary/org.springframework.boot.ide.main.feature_root_4.3.1.201907111441-CI-B1919

This happened probably due to the update repository being updated while you where trying to access it, causing stale repository cache data in your repo. To solve this, you can go to the Preferences -> Install/Update -> Available Update Sites, select the STS4 nightly one that you seem to use, and press Reload. In some cases, that is enough. If not, delete the update site from the preferences, restart the IDE, and add it back. That wipes out the stale cache data as a last resort.

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commented Jul 12, 2019

@mweirauch @wilkinsona It looks like Nieraj can reproduce this and it seems indeed related to the language server being enabled for Spring XML config files. We need to investigate this in more depth, but I wanted to let you know that in case you don't need any Spring specific content-assist support in XML files, you can disable the language server for XML files in the preferences and that will speed up opening pom.xml files, too.

We will work on a solution for that. Will not make it into the 4.3.1 release (going out today), but soon after.

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commented Jul 12, 2019

(comment in Pivotal Tracker added by Martin Lippert:)

still performance issues, see additional comments on GitHub

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commented Jul 16, 2019

I made some small adjustments to content-type defintions, which relates to language server being triggered for various xml files when it shouldn't due to a bug in lsp4e.

See: #320

This may also be related to the performance issues when opening pom.xml since I saw that basically any xml file, including pom.xml was treated as a spring config file and caused starting language server process.

@mweirauch

jps | grep BootLanguagServerBootApp | wc -l
53

53 language servers?! That seems very odd and highly suspicious. Should only be one server at most per active Eclipse instance. Maybe it is not related to the performance problem you are having, but at the least its really not supposed to have that many servers running and indeed, that many processes would put a strain on your entire machine, the memory consumtion alone should probably grind any machine to a halt.

It is interesting to note that the processes all went away when you closed STS, so that kind of implies that all these processed did actually belong to that same STS instance and were not just accumulated rogues left over from something that crashed.

@kdvolder

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commented Jul 16, 2019

When I try and keep an eye on the number of BootLanguagServerBootApp processes it seems to be as expected, just one per instance of running STS.

@mweirauch

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commented Jul 17, 2019

@kdvolder The 53 language server processes where observed with Spring Tool Suite 4 (2019-06) / Version: 4.3.1.CI-B1921 / Build Id: 201907120604.

I just tried with Spring Tool Suite 4 (2019-06) / Version: 4.3.2.CI-B1925 / Build Id: 201907161853 and there is only one BootLanguagServerbootApp with the same workspace. So might have been a regression or bad luck.

Regarding the inital topic, I enabled "Spring XML Config files support", restarted afformentioned STS4 nightly and there seems to be no noticeable delay anymore for me. (only the first open of a pom.xml had a small 1s delay; subsequent opens are "fast")

@kdvolder

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commented Jul 17, 2019

@mweirauch Thanks for trying again. I am still suspicious of the 53 servers situation. But until you see it happening again I think there's not much we can do now, and possibly recent changes have actually fixed the issue also.

So I will close this ticket for now. But please don't hesitate to post more details here or raise a new issue, if your experience more issues.

@spring-issuemaster

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commented Jul 29, 2019

(comment in Pivotal Tracker added by Martin Lippert:)

Looks like this is solved, but changes might have caused this to break: #167561911

@vogella

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commented Aug 7, 2019

We also observed a UI freeze of 66 seconds due to this bug. Using the nightly build from https://dist.springsource.com/snapshot/STS/nightly-distributions.html solved that for us.

Thanks for the fix @kdvolder

@martinlippert

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commented Aug 7, 2019

@vogella Great to hear that this fixed the issue on your end, too.

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