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  1. ,
    via javacodegeeks.com by Unknown author

    Causes : The Collection is internally modified, while a thread is iterating over it. OR after the creation of an iterator, the Collection is internally modified by any method other than the iterator’s own methods for removal and addition.

  2. ,
    via oracle.com by Unknown author

    In order to avoid more than one threads accessing or modifying the same object, you can synchronize them over the object, in order to allow only one thread to manipulate it over time.

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via GitHub by MicheleMUC
, 1 year ago
via GitHub by sonykill
, 1 year ago
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via Oracle Community by AbbasHusain, 2 years ago
via Jenkins JIRA by Serj Rashitov, 1 year ago
via Jenkins JIRA by Serj Rashitov, 2 years ago
via Coderanch by Shailesh Modi, 1 year ago
This exception has no message.
java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedMethodAccessor33.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.emf.emfstore.internal.common.observer.ObserverBus$ProxyHandler.notifiyObservers(ObserverBus.java:309) at org.eclipse.emf.emfstore.internal.common.observer.ObserverBus$ProxyHandler.invoke(ObserverBus.java:277) at com.sun.proxy.$Proxy21.commandCompleted(Unknown Source) at org.eclipse.emf.emfstore.internal.client.model.changeTracking.commands.EMFStoreCommandNotifier.notifiyListenersAboutCommandCompleted(EMFStoreCommandNotifier.java:72) at org.eclipse.emf.emfstore.internal.client.model.changeTracking.commands.EMFStoreBasicCommandStack.execute(EMFStoreBasicCommandStack.java:79) at org.eclipse.emf.emfstore.internal.client.model.util.AbstractEMFStoreCommand.aRun(AbstractEMFStoreCommand.java:108) at org.eclipse.emf.emfstore.internal.client.model.util.EMFStoreCommand.run(EMFStoreCommand.java:60) at org.eclipse.emf.emfstore.client.util.RunESCommand.run(RunESCommand.java:145) at org.eclipse.emf.ecp.emfstore.core.internal.EMFStoreProvider.fillChildren(EMFStoreProvider.java:164) at org.eclipse.emf.ecp.internal.core.ECPProviderRegistryImpl$ProviderDescriptor.fillChildren(ECPProviderRegistryImpl.java:222) at org.eclipse.emf.ecp.internal.ui.model.ECPContentProvider.fillChildren(ECPContentProvider.java:50) at org.eclipse.emf.ecp.internal.ui.model.ModelContentProvider.fillChildren(ModelContentProvider.java:68) at org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider.fillChildrenDetectError(TreeContentProvider.java:198) at org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider.getChildrenList(TreeContentProvider.java:190) at org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider.hasChildren(TreeContentProvider.java:61) at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2139) at org.eclipse.jface.viewers.TreeViewer.isExpandable(TreeViewer.java:553) at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2169) at org.eclipse.jface.viewers.AbstractTreeViewer.updatePlus(AbstractTreeViewer.java:2861) at org.eclipse.jface.viewers.TreeViewer.updatePlus(TreeViewer.java:804) at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2753) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1916) at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:684) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1891) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1848) at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1834) at org.eclipse.jface.viewers.StructuredViewer$7.run(StructuredViewer.java:1526) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1462) at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:366) at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1423) at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1523) at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:522) at org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider.refresh(TreeContentProvider.java:211) at org.eclipse.emf.ecp.internal.ui.model.TreeContentProvider$1.run(TreeContentProvider.java:160) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4155) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3772) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at net.bhl.cdt.client.Application.start(Application.java:26) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608) at org.eclipse.equinox.launcher.Main.run(Main.java:1515) at org.eclipse.equinox.launcher.Main.main(Main.java:1488)Caused by: java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$Itr.next(Unknown Source) at org.eclipse.emf.emfstore.internal.client.model.impl.ProjectSpaceBase.addOperations(ProjectSpaceBase.java:218) at org.eclipse.emf.emfstore.internal.client.model.impl.OperationManager.operationsRecorded(OperationManager.java:156) at org.eclipse.emf.emfstore.internal.client.model.impl.OperationRecorder.operationsRecorded(OperationRecorder.java:306) at org.eclipse.emf.emfstore.internal.client.model.impl.OperationRecorder.commandCompleted(OperationRecorder.java:523) at org.eclipse.emf.emfstore.internal.client.model.impl.OperationRecorder.commandCompleted(OperationRecorder.java:471) ... 63 more