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Bug 350940

Summary:	Error: 3004 Unexpected Error Occurred
Product:	z_Archived	Reporter:	Simon Goodall <simon.goodall>
Component:	Mylyn	Assignee:	Mylyn Inbox <mylyn-inbox>
Status:	RESOLVED WORKSFORME	QA Contact:
Severity:	normal
Priority:	P3
Version:	3.5
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Simon Goodall

2011-07-01 10:12:13 EDT

What steps will reproduce the problem?
1. Imported local Task context from a different workspace
2. Any change to task list causes the following exception
3. 


-- Error Details --
Date: Fri Jul 01 15:01:44 BST 2011
Message: Notification failed for: null
Severity: Error
Product: Eclipse Platform 3.6.2.v201102101200 (org.eclipse.platform.ide)
Plugin: org.eclipse.mylyn.tasks.core
Session Data:
eclipse.buildId=M20110210-1200
java.version=1.6.0_26
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_GB
Framework arguments:  -showlocation
Command-line arguments:  -os win32 -ws win32 -arch x86 -data C:\Projects\workspace -showlocation


Exception Stack Trace:
java.lang.NullPointerException
at org.eclipse.mylyn.internal.tasks.core.TaskList.fireDelta(TaskList.java:260)
at org.eclipse.mylyn.internal.tasks.core.TaskList.notifyElementsChanged(TaskList.java:482)
at org.eclipse.mylyn.internal.tasks.core.TaskList.notifyElementChanged(TaskList.java:503)
at org.eclipse.mylyn.internal.context.ui.commands.ClearContextHandler.run(ClearContextHandler.java:43)
at org.eclipse.mylyn.internal.context.ui.editors.ContextEditorFormPage$8.linkActivated(ContextEditorFormPage.java:340)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleActivate(AbstractHyperlink.java:233)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.handleMouseUp(AbstractHyperlink.java:327)
at org.eclipse.ui.forms.widgets.AbstractHyperlink.access$2(AbstractHyperlink.java:311)
at org.eclipse.ui.forms.widgets.AbstractHyperlink$4.handleEvent(AbstractHyperlink.java:125)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
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:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)

Comment 1 Steffen Pingel

2011-07-26 13:48:19 EDT

Can you provide steps how you imported the task context?

Comment 2 Simon Goodall

2011-07-28 07:17:26 EDT

I have two workspaces configured on different branches of the same codebase.

I created a new set of tasks in one.
Ran the task export (from file menu) and saved a zip file
In the other eclipse/workspace I imported the tasks


My problem workspace seemed to correct itself after a restart of eclipse

I've just retested on a fresh workspace and not been able to reproduce the problem myself.

Comment 3 Steffen Pingel

2011-08-26 08:32:47 EDT

Looking at the stack trace it's not clear to me why the listener object would be null. I would recommend updating to the latest version since the code has changed slightly since then.

I'll mark this as resolved for now but please reopen in case you encounter this problem again.