[jbosstools-issues] [JBoss JIRA] (JBIDE-11185) ConcurrentModificationException in SeamRuntimeListFieldEditor when user deletes Seam Runtime (probably during project building)

[Viacheslav Kabanovich (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-11185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12675648#comment-12675648 ] 

Viacheslav Kabanovich commented on JBIDE-11185:
-----------------------------------------------

Cannot reproduce. The code that access 'List<SeamRuntime> removed' looks quite safe. Daniel, please reproduce this exception in your environment, and give steps.
                
> ConcurrentModificationException in SeamRuntimeListFieldEditor when user deletes Seam Runtime (probably during project building)
> -------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBIDE-11185
>                 URL: https://issues.jboss.org/browse/JBIDE-11185
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: Seam 2
>    Affects Versions: 3.3.0.M5
>            Reporter: Daniel Azarov
>            Assignee: Viacheslav Kabanovich
>             Fix For: 3.3.0.Beta2
>
>
> This issue was found during verification of JBIDE-11174
> I had few seam projects with few different seam runtimes, I just started the Studio and began deleting seam runtimes one by one.
> I got few similar exceptions:
> {code}
> java.util.ConcurrentModificationException
> 	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:782)
> 	at java.util.ArrayList$Itr.next(ArrayList.java:754)
> 	at org.jboss.tools.seam.ui.widget.editor.SeamRuntimeListFieldEditor.performApply(SeamRuntimeListFieldEditor.java:181)
> 	at org.jboss.tools.seam.ui.widget.editor.SeamRuntimeListFieldEditor$RemoveAction.run(SeamRuntimeListFieldEditor.java:1174)
> 	at org.jboss.tools.seam.ui.widget.editor.SeamRuntimeListFieldEditor$ActionButton$1.widgetSelected(SeamRuntimeListFieldEditor.java:949)
> 	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
> 	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
> 	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
> 	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3588)
> 	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3209)
> 	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
> 	at org.eclipse.jface.window.Window.open(Window.java:801)
> 	at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:215)
> 	at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:54)
> 	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
> 	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
> 	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
> 	at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
> 	at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)
> 	at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157)
> 	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
> 	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
> 	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
> 	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
> 	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
> 	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3588)
> 	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3209)
> 	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
> 	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
> 	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
> 	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
> 	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
> 	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
> 	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
> 	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
> 	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
> 	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344)
> 	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:616)
> 	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
> 	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
> 	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
> 	at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
> {code}

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