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java.util.concurrent.TimeoutException after sometime of usage when using content assist

See original GitHub issue

Hi,

sometimes after some usage of the Eclipse Spring Tools version, I’m getting UI freezes when trying to use content-assist (Ctrl+Space). There is also a stacktrace in my journalctl -f [1].

I’m not sure why it happens though. I always just use the IDE as normal and after some time of usage without problems, I’m getting this problem. A restart of the IDE fixes the problem.

Specs:

Fedora 29
Java 11 (not sure if this could be the cause, I will try Java 8 for some time and then report back here)
Eclipse STS Version: 4.0.1.RELEASE
No plugins installed

I’m happy to provide additional info if needed.

[1]:

Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1771)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.springframework.tooling.boot.ls.jdt.SpringBootJavaCompletionProposalComputer.computeCompletionProposals(SpringBootJavaCompletionProposalComputer.java:55)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:336)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:340)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:334)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:291)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.ContentAssistant$2.lambda$0(ContentAssistant.java:2012)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at java.util.Collections$SingletonSet.forEach(Collections.java:4767)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:2011)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:2008)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:561)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.CompletionProposalPopup.lambda$0(CompletionProposalPopup.java:491)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:486)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1822)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:189)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.texteditor.ContentAssistAction.lambda$0(ContentAssistAction.java:85)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:72)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.texteditor.ContentAssistAction.run(ContentAssistAction.java:84)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.action.Action.runWithEvent(Action.java:476)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:121)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:96)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at sun.reflect.GeneratedMethodAccessor72.invoke(Unknown Source)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at java.lang.reflect.Method.invoke(Method.java:498)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:320)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:254)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:164)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:156)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.commands.Command.executeWithChecks(Command.java:497)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:490)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:207)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:308)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:582)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:651)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:441)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$2(KeyBindingDispatcher.java:384)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:96)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1752)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1373)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1400)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1383)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1412)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:787)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3794)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:862)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1990)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Control.windowProc(Control.java:6524)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Display.windowProc(Display.java:6014)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.internal.gtk.GTK._gtk_main_do_event(Native Method)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.internal.gtk.GTK.gtk_main_do_event(GTK.java:4118)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Display.eventProc(Display.java:1414)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:1596)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4581)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1173)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1062)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:628)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:563)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:151)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:155)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:199)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:391)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:246)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at java.lang.reflect.Method.invoke(Method.java:498)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.equinox.launcher.Main.basicRun(Main.java:595)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.equinox.launcher.Main.run(Main.java:1501)
Nov 10 15:56:54 localhost.localdomain Spring Tool Suite 4.desktop[1878]:         at org.eclipse.equinox.launcher.Main.main(Main.java:1474)