Pydev Package Explorer crashed

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https://sourceforge.net/forum/message.php?msg_id=4393380

By: theepraphan

When I open the package explorer first time, after I start
Eclipse, I got the
follow error message and stop working

Error creating the view.(Time of error: July 3, 2007 9:14:16
AM GMT+07:00)
Reason:
java.util.ConcurrentModificationException

But when I waiting for a while, it is working.
When I use java package explorer which come with eclipse, it
is working most
of the time, but there are few time that it showed the same
error message, but
I couldn't simulate it not like pydev package explorer which
shown error message
all the times.

My configuration :
- Eclipse 3.3
- Python 2.5
- Trac 10.4, I started the local server
- Mylyn 2.0
- Subversion 10.4 and Subclipse 1.2.3 (subversion plugin)

The configuration was working in Eclipse 3.2 with Mylyn 1

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By: fabioz

Pydev is still not tested with Mylyn... (it's still with the
mylar integration...)
I intend to make the porting to the new version this
weekend.

Cheers,

Fabio

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By: oskar_heck

Did this happen with the new pyDev 1.3.6 release?

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By: xellzhang

I met this problem too and have no idea about this. Is this
a bug?

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By: theepraphan

Just upgrade to pydev 1.3.7 with pydev mylyn feature 0.3,
the bug still there.
The error message is the same.

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> Just upgrade to pydev 1.3.7 with pydev mylyn feature
0.3, the bug still  
> there.
> The error message is the same.

Same with me: Eclipse 3.3 / 1.3.7 / no MyLin / Win2K
PyDev-Package-Explorer crashes on startup. Closing the  
Package-Explorer-View and reopening it afterwards (Window -
Show View -  
...) works as a workaround for the moment. But 1.3.7 did not
solve the  
problem!

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(Unknown
Source)
	at java.util.HashMap$ValueIterator.next(Unknown Source)
	at
java.util.Collections$UnmodifiableCollection$1.next(Unknown
Source)
	at  
org.eclipse.ui.internal.navigator.NavigatorContentService.re
storeState(NavigatorContentService.java:883)
	at  
org.eclipse.ui.navigator.CommonNavigator.createPartControl(C
ommonNavigator.java:191)
	at  
org.python.pydev.navigator.ui.PydevPackageExplorer.createPar
tControl(PydevPackageExplorer.java:126)
	at  
org.eclipse.ui.internal.ViewReference.createPartHelper(ViewR
eference.java:370)
	at  
org.eclipse.ui.internal.ViewReference.createPart(ViewReferen
ce.java:227)
	at  
org.eclipse.ui.internal.WorkbenchPartReference.getPart(Workb
enchPartReference.java:592)
	at
org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:29
9)
	at
org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:53
1)
	at  
org.eclipse.ui.internal.presentations.PresentablePart.setVis
ible(PresentablePart.java:179)
	at  
org.eclipse.ui.internal.presentations.util.PresentablePartFo
lder.select(PresentablePartFolder.java:268)
	at  
org.eclipse.ui.internal.presentations.util.LeftToRightTabOrd
er.select(LeftToRightTabOrder.java:65)
	at  
org.eclipse.ui.internal.presentations.util.TabbedStackPresen
tation.selectPart(TabbedStackPresentation.java:400)
	at  
org.eclipse.ui.internal.PartStack.refreshPresentationSelecti
on(PartStack.java:1256)
	at
org.eclipse.ui.internal.PartStack.createControl(PartStack.ja
va:668)
	at
org.eclipse.ui.internal.PartStack.createControl(PartStack.ja
va:576)
	at  
org.eclipse.ui.internal.PartSashContainer.createControl(Part
SashContainer.java:563)
	at  
org.eclipse.ui.internal.PerspectiveHelper.activate(Perspecti
veHelper.java:270)
	at
org.eclipse.ui.internal.Perspective.onActivate(Perspective.j
ava:931)
	at  
org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPa
ge.java:2497)
	at  
org.eclipse.ui.internal.WorkbenchWindow$23.run(WorkbenchWind
ow.java:2837)
	at
org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator
.java:67)
	at  
org.eclipse.ui.internal.WorkbenchWindow.setActivePage(Workbe
nchWindow.java:2818)
	at  
org.eclipse.ui.internal.WorkbenchWindow$17.runWithException(
WorkbenchWindow.java:2135)
	at  
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run
(StartupThreading.java:31)
	at
org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3
5)
	at  
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr
onizer.java:123)
	at
org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav
a:3659)
	at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java
:3296)
	at  
org.eclipse.ui.application.WorkbenchAdvisor.openWindows(Work
benchAdvisor.java:797)
	at  
org.eclipse.ui.internal.Workbench$25.runWithException(Workbe
nch.java:1342)
	at  
org.eclipse.ui.internal.StartupThreading$StartupRunnable.run
(StartupThreading.java:31)
	at
org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:3
5)
	at  
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchr
onizer.java:123)
	at
org.eclipse.swt.widgets.Display.runAsyncMessages(Display.jav
a:3659)
	at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java
:3296)
	at
org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2309)

	at
org.eclipse.ui.internal.Workbench.access$4(Workbench.java:22
19)
	at
org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
	at  
org.eclipse.core.databinding.observable.Realm.runWithDefault
(Realm.java:289)
	at  
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Work
bench.java:461)
	at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.j
ava:149)
	at  
org.eclipse.ui.internal.ide.application.IDEApplication.start
(IDEApplication.java:106)
	at  
org.eclipse.equinox.internal.app.EclipseAppHandle.run(Eclips
eAppHandle.java:153)
	at  
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher
.runApplication(EclipseAppLauncher.java:106)
	at  
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher
.start(EclipseAppLauncher.java:76)
	at  
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS
tarter.java:363)
	at  
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseS
tarter.java:176)
	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:
504)
	at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1169)


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By: gamlidek

Ok, reset back to fresh install and started loading packages
one at a time,
starting with PyDEV.  PyDEV loaded fine and Eclipse
restarted with no problems
with the PyDEV perspective at all.  Added Database Tools
which required EMF
Tools, restarted and the problem appears.  I don't know if
the compatibility
issue is with EMF or with the Database Tools, but that's
where I got.

cheers.

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By: fabioz

Ok, one more note about it: this error only seems to happen
with java 1.6 (so,
downgrading to java 1.5 should make it work).

A fix for pydev is also available in the cvs (and will be
released in pydev
1.3.8).

Cheers,

Fabio

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