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Here is a typical stack trace of the freeze: Stack Trace at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.createReader(XMLEntityManager.java:2363) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:694) at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:148) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:772) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339) at org.eclipse.debug.internal.core.LaunchManager.createInfoFromXML(LaunchManager.java:953) at org.eclipse.debug.internal.core.LaunchManager.getInfo(LaunchManager.java:1371) at org.eclipse.debug.internal.core.LaunchConfiguration.getInfo(LaunchConfiguration.java:470) at org.eclipse.debug.internal.core.LaunchConfiguration.getType(LaunchConfiguration.java:640) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.getLaunchConfigurations(LaunchConfigurationManager.java:597) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.restoreHistory(LaunchConfigurationManager.java:560) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.restoreLaunchHistory(LaunchConfigurationManager.java:538) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.loadLaunchHistories(LaunchConfigurationManager.java:1066) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationManager.getLaunchHistory(LaunchConfigurationManager.java:1038) at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.internalGetHistory(AbstractLaunchHistoryAction.java:547) at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.getToolTip(AbstractLaunchHistoryAction.java:233) at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.updateTooltip(AbstractLaunchHistoryAction.java:198) at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.initialize(AbstractLaunchHistoryAction.java:168) at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.selectionChanged(AbstractLaunchHistoryAction.java:513) at org.eclipse.ui.internal.PluginAction.refreshEnablement(PluginAction.java:206) at org.eclipse.ui.internal.PluginAction.createDelegate(PluginAction.java:126) at org.eclipse.ui.internal.WWinPluginAction.refreshActionList(WWinPluginAction.java:158) at org.eclipse.ui.plugin.AbstractUIPlugin.lambda$0(AbstractUIPlugin.java:481) at org.eclipse.ui.plugin.AbstractUIPlugin$$Lambda$56/1476479463.run(Unknown Source) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:37) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4468) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4081) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1133) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153) at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:684) at org.eclipse.ui.internal.Workbench$$Lambda$14/1820355723.run(Unknown Source) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243) 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:653) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590) at org.eclipse.equinox.launcher.Main.run(Main.java:1499) at org.eclipse.equinox.launcher.Main.main(Main.java:1472) Too much work is apparently being done on the UI thread. There shouldn't be a need to do that much on the UI thread since the work is already done asynchronously.
LaunchConfiguration.getInfo is invoked from many places, needs more analysis before changing it.
(In reply to Sarika Sinha from comment #1) > LaunchConfiguration.getInfo is invoked from many places, needs more analysis > before changing it. Doesn't the stack trace provide enough context?
getInfo method is invoked in many scenarios(not only while getting history), we need to examine all of them.
(In reply to Sarika Sinha from comment #3) > getInfo method is invoked in many scenarios(not only while getting history), > we need to examine all of them. Why not address this specific scenario (AbstractLaunchHistoryAction.selectionChanged) first and worry about other scenarios later?
Will look into this in 4.8
Will not be able to take this up.
The tooltip update does not need to run within the UI thread. Thus getting the tooltip text and setting it for the action can be done in a background thread. This will make AbstractLaunchHistoryAction.initialize() complete fast without blocking the UI while just getting a tooltip text.
New Gerrit change created: https://git.eclipse.org/r/152662
Gerrit change https://git.eclipse.org/r/152662 was merged to [master]. Commit: http://git.eclipse.org/c/platform/eclipse.platform.debug.git/commit/?id=2e6899ce766c03ac6e36f6579f75d0867abfc49b
Affects also startup time, since the actions are initialized during startup.
