1. #1
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    Default [1.2.4] Stack trace that appears...

    [1.2.4] Stack trace that appears...


    I have a stack trace apprearing in the middle of nowhere, without any relationship with any particular action in my GXT application, I just find it sometimes in the stack window under the hosted environment. Do you have any ideas of what it can be:

    [ERROR] Uncaught exception escaped
    java.util.ConcurrentModificationException: null
    at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
    at java.util.AbstractList$Itr.next(AbstractList.java:343)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:364)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:238)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:378)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:238)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:378)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:238)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:378)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:238)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:378)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.LayoutContainer.layout(LayoutContainer.java:238)
    at com.extjs.gxt.ui.client.widget.Container.doLayout(Container.java:378)
    at com.extjs.gxt.ui.client.widget.Container.layout(Container.java:457)
    at com.extjs.gxt.ui.client.widget.Layout.layoutContainer(Layout.java:223)
    at com.extjs.gxt.ui.client.widget.layout.CardLayout.setActiveItem(CardLayout.java:76)
    at com.extjs.gxt.ui.client.widget.TabPanel.setSelection(TabPanel.java:610)
    at com.extjs.gxt.ui.client.widget.TabPanel.onItemClick(TabPanel.java:800)
    at com.extjs.gxt.ui.client.widget.TabItem$HeaderItem.onClick(TabItem.java:133)
    at com.extjs.gxt.ui.client.widget.TabItem$HeaderItem.onComponentEvent(TabItem.java:88)
    at com.extjs.gxt.ui.client.widget.Component.onBrowserEvent(Component.java:722)
    at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1308)
    at com.google.gwt.user.client.DOM.dispatchEventAndCatch(DOM.java:1287)
    at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1255)
    at sun.reflect.GeneratedMethodAccessor123.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
    at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod(IDispatchImpl.java:126)
    at com.google.gwt.dev.shell.ie.IDispatchProxy.invoke(IDispatchProxy.java:155)
    at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke(IDispatchImpl.java:294)
    at com.google.gwt.dev.shell.ie.IDispatchImpl.method6(IDispatchImpl.java:194)
    at org.eclipse.swt.internal.ole.win32.COMObject.callback6(COMObject.java:117)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
    at com.google.gwt.dev.GWTShell.pumpEventLoop(GWTShell.java:720)
    at com.google.gwt.dev.GWTShell.run(GWTShell.java:593)
    at com.google.gwt.dev.GWTShell.main(GWTShell.java:357)

  2. #2
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    Is it possible that you are removing an item in a middle of a layoutcall? This is why you get a ConcurrentModificationException

  3. #3
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    Default


    There is a moment when I do removeAll on the layout container, but it's only in response to a button press, so at that moment everything should be already rendered... Anyway, would it be that, it would _always_ appear, and it's not the case here, it stays pretty random...

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