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Bug 337549

Summary:

concurrentmodificationexception occurs while loading the node(tree structure)

Product:

[Modeling] EMF

Reporter:

madhuri <madhuri_karanam>

Component:

Edit

Assignee:

Ed Merks <Ed.Merks>

Status:

RESOLVED WORKSFORME

QA Contact:

Severity:

normal

Priority:

Version:

unspecified

Target Milestone:

---

Hardware:

OS:

Windows XP

Whiteboard:

Attachments:

Description	Flags
File which throws the ConcurrentModificationException	none

Description madhuri

2011-02-18 06:11:26 EST

Build Identifier: eclipse.buildId=I20100608-0911

An eclipse application is launched with own perspective(ACE) opened.The node in the tree structure get loaded.While loading the node and node elements,the following error is displayed in the error log.

!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (java.util.ConcurrentModificationException)
	at org.eclipse.swt.SWT.error(SWT.java:4083)
	at org.eclipse.swt.SWT.error(SWT.java:3998)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:137)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4041)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3660)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2629)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2593)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2427)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:670)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:663)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1383)
Caused by: java.util.ConcurrentModificationException
	at org.eclipse.emf.common.util.AbstractEList$EIterator.checkModCount(AbstractEList.java:762)
	at org.eclipse.emf.common.util.AbstractEList$EIterator.doNext(AbstractEList.java:710)
	at org.eclipse.emf.common.util.AbstractEList$EIterator.next(AbstractEList.java:696)
	at org.eclipse.emf.edit.provider.ItemProviderAdapter.getChildren(ItemProviderAdapter.java:340)
	at org.eclipse.emf.edit.provider.ItemProviderAdapter.hasChildren(ItemProviderAdapter.java:397)
	at org.eclipse.emf.edit.provider.ItemProviderAdapter.hasChildren(ItemProviderAdapter.java:384)
	at org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider.hasChildren(AdapterFactoryContentProvider.java:198)
	at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2086)
	at org.eclipse.jface.viewers.TreeViewer.isExpandable(TreeViewer.java:588)
	at org.eclipse.jface.viewers.AbstractTreeViewer.isExpandable(AbstractTreeViewer.java:2112)
	at org.eclipse.jface.viewers.AbstractTreeViewer.updatePlus(AbstractTreeViewer.java:2794)
	at org.eclipse.jface.viewers.TreeViewer.updatePlus(TreeViewer.java:852)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1832)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1799)
	at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1514)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1422)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1383)
	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1512)
	at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:548)
	at org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider$ViewerRefresh.refresh(AdapterFactoryContentProvider.java:495)
	at org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider$ViewerRefresh.run(AdapterFactoryContentProvider.java:463)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
	... 23 more


Don't know what is the reason?
I don't see anything that is related to my code in the log displayed.
Can anyone help on this issue?

Thank you in advance...

Reproducible: Always

Comment 1 Ed Merks

2011-02-21 22:13:28 EST

If I can't reproduce it, I can't comment on it.  Most likely you're doing something funky in your model's implementation classes that I'd need to see.  If you can provide a reproducible test case, please reopen it.

Comment 2 madhuri

2011-02-22 06:21:01 EST

Created attachment 189470 [details]
File which throws the ConcurrentModificationException

In the Attached file,the exception is thrown inside the method LoadRepository().
While debugging,Found that its thrown at the first line of 
 for(MSkeleton skeleton : getSortedSkeletonList(skeletons)){
}
 
how to make changes so that this ConcurrentModificationException does not occurs?