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Home » Language IDEs » Java Development Tools (JDT) » Eclipse suddenly acting up: No completion, no Task view, Mylyn involved(Eclipse suddenly acting up: No completion, no Task view, Mylyn involved)
Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1127683] Mon, 07 October 2013 00:03 Go to next message
Peter Drake is currently offline Peter DrakeFriend
Messages: 17
Registered: October 2010
Junior Member
My Eclipse is mostly working, but has suddenly started displaying some odd symptoms:

1) I get no autocompletion.

2) The Tasks view has a red stop sign with an exclamation point and this message:

Could not create the view: org.eclipse.mylyn.tasks.ui.views.tasks

3) While there's nothing (aside from some expected warnings) in the Problems view, there are many things in the Error Log. Examples:

Unable to resolve plug-in "platform:/plugin/org.eclipse.mylyn.tasks.ui/icons/eview16/task-list.gif"
Unable to find Action Set: orge.eclipse.wb.core.ui.actionset
...
Could not parse value for theme color badColor 3
...


Does anyone have any idea what might be going on (and how to fix it)?

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1129415 is a reply to message #1127683] Tue, 08 October 2013 15:59 Go to previous messageGo to next message
Stephan Herrmann is currently offline Stephan HerrmannFriend
Messages: 1853
Registered: July 2009
Senior Member
This looks pretty broken. I recommend looking for the first (serious) error in the log after session start. If you paste that error's stack trace maybe someone will recognize the problem.

Stephan

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1129840 is a reply to message #1129415] Wed, 09 October 2013 02:14 Go to previous messageGo to next message
Peter Drake is currently offline Peter DrakeFriend
Messages: 17
Registered: October 2010
Junior Member
I don't know how to identify a "serious" error, but the first one is:

Unable to find Action Set: org.eclipse.mylyn.context.ui.actionSet

Stack trace? Nope:

An exception stack trace is not available.

The fourth error is:

Unable to resolve plug-in "platform:/plugin/org.eclipse.mylyn.tasks.ui/icons/eview16/task-list.gif".

That one does have a stack trace:

java.io.IOException: Unable to resolve plug-in "platform:/plugin/org.eclipse.mylyn.tasks.ui/icons/eview16/task-list.gif".
at org.eclipse.core.internal.runtime.PlatformURLPluginConnection.parse(PlatformURLPluginConnection.java:64)
at org.eclipse.core.internal.runtime.PlatformURLPluginConnection.resolve(PlatformURLPluginConnection.java:75)
at org.eclipse.core.internal.boot.PlatformURLHandler.openConnection(PlatformURLHandler.java:67)
at org.eclipse.osgi.framework.internal.protocol.URLStreamHandlerProxy.openConnection(URLStreamHandlerProxy.java:112)
at java.net.URL.openConnection(URL.java:971)
at org.eclipse.core.internal.runtime.PlatformURLConverter.toFileURL(PlatformURLConverter.java:33)
at org.eclipse.core.runtime.FileLocator.toFileURL(FileLocator.java:206)
at org.eclipse.jface.resource.URLImageDescriptor.getFilePath(URLImageDescriptor.java:137)
at org.eclipse.jface.resource.URLImageDescriptor.createImage(URLImageDescriptor.java:157)
at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:227)
at org.eclipse.jface.resource.ImageDescriptor.createImage(ImageDescriptor.java:205)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.getImage(SWTPartRenderer.java:193)
at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.createTab(StackRenderer.java:680)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.processContents(LazyStackRenderer.java:133)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveRenderer.processContents(PerspectiveRenderer.java:59)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.showTab(PerspectiveStackRenderer.java:103)
at org.eclipse.e4.ui.workbench.renderers.swt.LazyStackRenderer.postProcess(LazyStackRenderer.java:97)
at org.eclipse.e4.ui.workbench.renderers.swt.PerspectiveStackRenderer.postProcess(PerspectiveStackRenderer.java:77)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:649)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:61)
at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:676)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:645)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:735)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:706)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:700)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:685)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1042)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:354)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1450)

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1131384 is a reply to message #1129840] Thu, 10 October 2013 13:21 Go to previous messageGo to next message
Stephan Herrmann is currently offline Stephan HerrmannFriend
Messages: 1853
Registered: July 2009
Senior Member
here's a naive question: are you sure mylyn is installed in your current instance of Eclipse?
Maybe the workspace has references to mylyn, but mylyn actually got lost during some update / re-install etc.?

OTOH, if mylyn is present, it could still be unavailable due to an exception during its initialization.
That's one of the reasons why I asked about preceding exceptions.

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1133921 is a reply to message #1131384] Sat, 12 October 2013 05:34 Go to previous messageGo to next message
Peter Drake is currently offline Peter DrakeFriend
Messages: 17
Registered: October 2010
Junior Member
Stephan: I have no idea whether mylyn is present. Is there a way to reinstall it?

I tried following the instructions at

http://wiki.eclipse.org/index.php/Mylyn/FAQ#Installation

but Eclipse says it can't find

http://download.eclipse.org/tools/mylyn/update/e3.4

What should I do?

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1367997 is a reply to message #1127683] Tue, 20 May 2014 01:31 Go to previous messageGo to next message
Son Pham is currently offline Son PhamFriend
Messages: 1
Registered: May 2014
Junior Member
Here is the way to fix:

Go to this folder: /Library/Java/JavaVirtualMachines/
Delete whatever is in it.

Go to this folder: /Library/Internet Plug-Ins
Delete the JavaAppletPlugin.plugin

Go to Oracle and Download both the JRE and JDK of the same version that you want, I recommend both 7 or 8.

Install JRE then JDK. Restart Eclipse. Everything is fine.

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Re: Eclipse suddenly acting up: No completion, no Task view, Mylyn involved [message #1723731 is a reply to message #1127683] Wed, 17 February 2016 12:39 Go to previous message
Alekos Psimikakis is currently offline Alekos PsimikakisFriend
Messages: 3
Registered: February 2016
Junior Member
As far as the error message "Could not create the view: org.eclipse.mylyn.tasks.ui.views.tasks" is concerned, here's what happened in my case and how I solved it:

I had this problem with Eclipse Neon version (not Luna/Mars), i.e. the error message appeared in the 'Task List' view each time I started Eclipse, even if if I used "-no-activate-task" in the command line.

The problem was most probably because I was using a "customized" environment create with previous versions and let Neon adapt it the first time I run it.

After I created a new "customized" environment from scratch, the error disappeared.

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