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Created attachment 288305 [details] small example application We have a 24/7 application where users open and close SWT/GTK Windows. We encounter a freeze of a SWT/GTK Window while opening a window. We created a minimal example in a open/close-loop which seems to reproduce the problem. The symptom is that when trying to open the window, the window frame is visible but the content just shows what was in the background at that point of time. You can still move the windows around, but closing is no longer possible and nothing of the whole application is refreshed. There is no error message or stacktrace visible. We reproduced this with SWT Versions: 3.118.0 (Eclipse 4.22), 3.16.0 (Eclipse 4.19) GTK 3.24.14, xserver-xorg 1.20.8, libx11-6 1.6.9 Frozen after 11.000 or 32.000 window openings (with a delay of 200ms) the crash occured after about 40min or 2h, so you need a bit patience to reproduce it, but it eventually happens all the time.
We also reproduced on GTK 3.22
Here is a stack trace after the freeze RUNNABLE - org.eclipse.swt.internal.gtk3.GTK3.gtk_main_iteration_do(Native Method) org.eclipse.swt.widgets.Shell.setVisible(Shell.java:2942) org.eclipse.e4.ui.workbench.addons.cleanupaddon.CleanupAddon.subscribeVisibilityChanged(CleanupAddon.java:190) jdk.internal.reflect.GeneratedMethodAccessor281.invoke(Unknown Source) java.base@11.0.5/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.base@11.0.5/java.lang.reflect.Method.invoke(Method.java:566) org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) org.eclipse.e4.ui.internal.di.UIEventObjectSupplier$UIEventHandler$$Lambda$571/0x00000008008eb840.run(Unknown Source) org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:236) org.eclipse.swt.widgets.Display.syncExec(Display.java:6012) org.eclipse.e4.ui.workbench.swt.DisplayUISynchronize.syncExec(DisplayUISynchronize.java:34) org.eclipse.e4.ui.internal.di.UIEventObjectSupplier$UIEventHandler.handleEvent(UIEventObjectSupplier.java:64) org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:205) org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:203) org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:228) org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:151) org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:133) org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:75) org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:44) org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:55) org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:63) org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:424) org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl.setVisible(UIElementImpl.java:361) de.scheidtbachmann.ibs.client.ui.windowregistry.internal.WindowPositioningHandler.showWindow(WindowPositioningHandler.java:456) de.scheidtbachmann.ibs.client.ui.windowregistry.internal.WindowPositioningHandler.bringToTopWithHighlight(WindowPositioningHandler.java:413) de.scheidtbachmann.ibs.client.ui.windowregistry.internal.WindowServiceImpl.open(WindowServiceImpl.java:165) de.scheidtbachmann.ibs.client.ui.menu.internal.handlers.OpenE4WindowHandler.execute(OpenE4WindowHandler.java:94) jdk.internal.reflect.GeneratedMethodAccessor388.invoke(Unknown Source) java.base@11.0.5/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.base@11.0.5/java.lang.reflect.Method.invoke(Method.java:566) org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58) org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:317) org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:251) org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:173) org.eclipse.e4.ui.workbench.renderers.swt.DirectContributionItem.executeItem(DirectContributionItem.java:133) org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:449) org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.lambda$2(AbstractContributionItem.java:475) org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem$$Lambda$853/0x0000000800b30440.handleEvent(Unknown Source) org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89) org.eclipse.swt.widgets.Display.sendEvent(Display.java:5895) org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1515) org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1541) org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524) org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1303) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot$2.run(AbstractSWTBot.java:190) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable$5.doRun(UIThreadRunnable.java:222) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.run(UIThreadRunnable.java:76) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.asyncExec(UIThreadRunnable.java:224) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.asyncExec(AbstractSWTBot.java:656) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:175) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:153) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:142) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.notify(AbstractSWTBot.java:132) org.eclipse.swtbot.swt.finder.widgets.SWTBotMenu$1.run(SWTBotMenu.java:88) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable$5.doRun(UIThreadRunnable.java:222) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.run(UIThreadRunnable.java:76) org.eclipse.swtbot.swt.finder.finders.UIThreadRunnable.asyncExec(UIThreadRunnable.java:224) org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.asyncExec(AbstractSWTBot.java:656) org.eclipse.swtbot.swt.finder.widgets.SWTBotMenu.click(SWTBotMenu.java:74) jdk.internal.reflect.GeneratedMethodAccessor469.invoke(Unknown Source) java.base@11.0.5/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.base@11.0.5/java.lang.reflect.Method.invoke(Method.java:566) de.scheidtbachmann.gp.graphics.remotecontrol.internal.ReflectionUtils$Call.invoke(ReflectionUtils.java:120) de.scheidtbachmann.gp.graphics.remotecontrol.internal.ReflectionUtils.invokeAction(ReflectionUtils.java:73) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:264) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:271) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:271) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:271) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:271) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.executeCommand(RemoteControlServlet.java:271) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet.lambda$1(RemoteControlServlet.java:184) de.scheidtbachmann.gp.graphics.remotecontrol.internal.RemoteControlServlet$$Lambda$1339/0x0000000800ee1440.call(Unknown Source) de.scheidtbachmann.gp.graphics.remotecontrol.swtbot.AbstractSWTRootObjectProvider.call(AbstractSWTRootObjectProvider.java:50) de.scheidtbachmann.gp.graphics.remotecontrol.swtbot.AbstractSWTRootObjectProvider.lambda$0(AbstractSWTRootObjectProvider.java:41) de.scheidtbachmann.gp.graphics.remotecontrol.swtbot.AbstractSWTRootObjectProvider$$Lambda$1318/0x0000000800ee6040.run(Unknown Source) org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40) org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185) org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:5101) org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4584) org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1154) org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338) org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1045) org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155) org.eclipse.e4.ui.internal.workbench.swt.E4Application.start(E4Application.java:168) org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136) org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) java.base@11.0.5/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) java.base@11.0.5/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) java.base@11.0.5/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.base@11.0.5/java.lang.reflect.Method.invoke(Method.java:566) app//org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:659) app//org.eclipse.equinox.launcher.Main.basicRun(Main.java:596) app//org.eclipse.equinox.launcher.Main.run(Main.java:1467) app//org.eclipse.equinox.launcher.Main.main(Main.java:1440)
The application uses an embedded Swing component. It seems that the issue is relevant to the Swing Look-and-feel: It could be reproduced with the GTK LaF and Metal LaF, but not with the Windows LaF and Motif LaF.
I wonder, do you need SWT_AWT for graphics only or do you need the full AWT/Swing stack? It's pretty easy to arrange a Graphics2D context on top of an SWT Image and all the threading and windowing problems inherent to SWT_AWT could be sidestepped.
