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thSoft / elysium

LilyPond IDE for Eclipse
http://elysium.thsoft.hu
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Frequent hangs during editing #43

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?

Unfortunately, I haven't been able to pick up a pattern to this, but it seems 
to happen when I'm back-spacing over errors and not when I'm typing a stream of 
syntactically correct characters. I have the impression that back-spacing over 
an incorrectly typed reserved word is a particular (but not reproducible) 
problem.

What is the expected output? What do you see instead?

I don't expect the product to hang while I'm editing. I'm forced to save the 
edited file frequently (every three or four bars) to avoid the loss of entered 
data. This slows data entry down enormously as it forces re-compilation of the 
whole piece.

What version of the product are you using? On what operating system?

I'm using Eclipse 1.4.1 with Elysium 0.2.1

Please provide any additional information below.

Original issue reported on code.google.com by hendry.m...@gmail.com on 21 Jan 2012 at 9:14

GoogleCodeExporter commented 9 years ago 
Hmm, slight unresponsive periods are known to exist, but if Eclipse hangs, 
that's a critical issue. Do you mean Eclipse 4.1? So far, only 3.7.1 is 
officially supported, but if there is enough interest, I'll look into e4 
support.

Original comment by harmathdenes on 21 Jan 2012 at 8:52

GoogleCodeExporter commented 9 years ago 
Sorry, I picked up the wrong version from the Installation Details list.

This is what I get from "Help=>About":

Eclipse IDE for Java Developers

Version: Indigo Service Release 1
Build id: 20110916-0149
(c) Copyright Eclipse contributors and others 2000, 2011.  All rights reserved.
Visit http://eclipse.org/

...and in the Installation Details it's the Eclipse IDE for Java Developers 
that's at version 1.4.1 (the number I gave in my initial post), The Eclipse 
Platform is indeed version 3.7.1.

Original comment by hendry.m...@gmail.com on 21 Jan 2012 at 9:59

GoogleCodeExporter commented 9 years ago 
Oh, I understand. Could you please open the Error Log view next time after you 
restart Eclipse after a hang and post the details (message and stack trace) of 
the most recent error coming from one of the Elysium plugins?

Original comment by harmathdenes on 24 Jan 2012 at 1:31

GoogleCodeExporter commented 9 years ago 
I think this is the information you need:

Unhandled event loop exception

java.lang.ClassCastException: java.lang.String cannot be cast to 
org.eclipse.emf.ecore.EObject
    at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eObjectForURIFragmentSegment(BasicEObjectImpl.java:557)
    at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:780)
    at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:756)
    at org.eclipse.xtext.resource.XtextResource.access$1(XtextResource.java:1)
    at org.eclipse.xtext.resource.XtextResource$1.getEObject(XtextResource.java:102)
    at org.eclipse.xtext.resource.DefaultFragmentProvider.getEObject(DefaultFragmentProvider.java:26)
    at org.eclipse.xtext.resource.XtextResource.getEObject(XtextResource.java:286)
    at org.eclipse.xtext.linking.lazy.LazyLinkingResource.getEObject(LazyLinkingResource.java:211)
    at org.eclipse.xtext.ui.editor.outline.impl.AbstractOutlineNode$2.exec(AbstractOutlineNode.java:160)
    at org.eclipse.xtext.ui.editor.outline.impl.AbstractOutlineNode$2.exec(AbstractOutlineNode.java:1)
    at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.readOnly(AbstractReadWriteAcces.java:32)
    at org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(XtextDocument.java:78)
    at org.eclipse.xtext.ui.editor.outline.impl.AbstractOutlineNode.readOnly(AbstractOutlineNode.java:158)
    at org.eclipse.xtext.ui.editor.outline.impl.AbstractOutlineNode.getChildren(AbstractOutlineNode.java:77)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.findBestNode(OutlineWithEditorLinker.java:138)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.findBestNode(OutlineWithEditorLinker.java:139)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.findBestNode(OutlineWithEditorLinker.java:139)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.findBestNode(OutlineWithEditorLinker.java:139)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.findBestNode(OutlineWithEditorLinker.java:139)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker.selectInTreeView(OutlineWithEditorLinker.java:127)
    at org.eclipse.xtext.ui.editor.outline.actions.OutlineWithEditorLinker$TextListener.selectionChanged(OutlineWithEditorLinker.java:62)
    at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2749)
    at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2697)
    at org.eclipse.jface.text.TextViewer$5.run(TextViewer.java:2676)
    at org.eclipse.swt.widgets.Display.timerProc(Display.java:4154)
    at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
    at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2276)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3207)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    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:344)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    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:616)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)

Original comment by hendry.m...@gmail.com on 24 Jan 2012 at 7:52

GoogleCodeExporter commented 9 years ago 
Here's some detail of a session in which I was adding lyrics to a song, and a 
hang occurred as I was typing the text (no commands, reserved words or brackets 
involved in what I was typing):

!SESSION 2012-01-24 21:20:45.951 -----------------------------------------------
eclipse.buildId=M20110909-1335
java.version=1.6.0_20
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_GB
Framework arguments:  -product org.eclipse.epp.package.java.product
Command-line arguments:  -os linux -ws gtk -arch x86 -product 
org.eclipse.epp.package.java.product

!ENTRY org.eclipse.epp.usagedata.recording 1 0 2012-01-24 21:21:35.953
!MESSAGE Usage data uploaded to http://udc.eclipse.org/upload.php in 4390 
milliseconds.
!SESSION 2012-01-24 21:43:21.872 -----------------------------------------------
eclipse.buildId=M20110909-1335
java.version=1.6.0_20
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_GB
Framework arguments:  -product org.eclipse.epp.package.java.product
Command-line arguments:  -os linux -ws gtk -arch x86 -product 
org.eclipse.epp.package.java.product

!ENTRY org.eclipse.core.resources 2 10035 2012-01-24 21:43:27.716
!MESSAGE The workspace exited with unsaved changes in the previous session; 
refreshing workspace to recover changes.

Original comment by hendry.m...@gmail.com on 24 Jan 2012 at 9:50

GoogleCodeExporter commented 9 years ago 
Thank you! The last thing I ask for is to attach a file during the editing of 
which the hang(s) occurred.
Anyway, the stack trace has no Elysium-specific item in it, so it may 
(possibly) indicate a bug in the used framework, Xtext. I recommend trying to 
update it first using the update site 
http://download.eclipse.org/modeling/tmf/xtext/updates/composite/releases

Original comment by harmathdenes on 25 Jan 2012 at 11:31

GoogleCodeExporter commented 9 years ago 
On Wed, 2012-01-25 at 23:31 +0000, elysium.eclipselabs.org@codespot.com
wrote:

OK, I'll see if I can update Xtext - but the link above fails with a
"404" error.

Attached is the file I was working on at the time.

I was trying out a feature I hadn't used before - adding lyrics - and
you'll see I've tried the two different methods of forcing new-lines, as
recommended in the manual.

I eventually got so fed up with hangs when I was typing in the lyrics
that I completed the job by typing the lyrics into gVim and
copying-and-pasting them into the Eclipse editor.

Original comment by hendry.m...@gmail.com on 26 Jan 2012 at 8:59

GoogleCodeExporter commented 9 years ago 
I understand it's a critical issue, I'm going to look into it soon. 
Unfortunately I can't see any attachment, could you retry it?
You can't visit an update site with a web browser. You have to add it to the 
Available Software Sites in Preferences and then Check for Updates afterwards.

Original comment by harmathdenes on 26 Jan 2012 at 10:33

GoogleCodeExporter commented 9 years ago 
I'd responded by e-mail and attached the file in the usual way, but it seems to 
have got lost in the process. I'm responding directly now, and will attach the 
file that way.

Original comment by hendry.m...@gmail.com on 26 Jan 2012 at 11:08

Attachments:

GoogleCodeExporter commented 9 years ago 
Thanks. So far, I can't reproduce the hang, but I'm trying hard. Meanwhile, as 
a workaround, you can close the Outline view, I'm sure it causes the problem.

Original comment by harmathdenes on 26 Jan 2012 at 11:17

GoogleCodeExporter commented 9 years ago 
PS I tried adding your update site to the list of Available Software Sites, but 
nothing is found there.

I thought it might be best to try a clean install on a different computer, and 
I'm trying to do this on my laptop. This is what I've done so far:

1. Download and install eclipse-SDK-3.7.1-linux-gtk.tar.gz. - Unpacked to 
$HOME, so the executable is $HOME/eclipse/eclipse.
2. Use Ubuntu Software Centre to install LilyPond. DONE - 
3. Eclipse needs a Java Runtime, so installed OpenJDK Java 7 Runtime using 
Ubuntu Software Centre.

I'm now trying to find Elysium...

Original comment by hendry.m...@gmail.com on 26 Jan 2012 at 11:22

GoogleCodeExporter commented 9 years ago 
I think you might be right about the Outline view, as "Refreshing Outline" (or 
a similar message) flashes up from time to time when I'm typing and then 
disappears afterwards, except when Eclipse hangs - it then remains on the 
screen.

I'll give that a try, thanks.

Original comment by hendry.m...@gmail.com on 26 Jan 2012 at 11:30

GoogleCodeExporter commented 9 years ago 
Having closed the Outline view, I typed in a paragraph of extra lyrics, with no 
hang.

I then opened up the Outline view again, and still couldn't reproduce the hang 
- weird!

I won't pursue the clean-install-on-the-laptop idea for the moment, and will 
try some more .ly files with the Outline disabled.

I don't know what the time is where you are, but it's time I was in bed!

Thanks for your help.

Original comment by hendry.m...@gmail.com on 26 Jan 2012 at 11:56

GoogleCodeExporter commented 9 years ago 
This is all very strange - I started Eclipse up again this morning, and opened 
the file which was giving me so much trouble earlier in the week. The "Outline" 
window was visible when I started it up, and I decided to leave it open and try 
to cause a hang.

Despite extensive input and revision, including the deliberate introduction of 
misspelled reserved words etc., I wasn't able to reproduce the problem.

I'll keep trying, and report back to you in due course.

Original comment by hendry.m...@gmail.com on 27 Jan 2012 at 7:22

GoogleCodeExporter commented 9 years ago 
Your file might have contained a specific content which caused the problem, 
which is now gone as you continued to edit it. I'm closing this issue for now, 
please reopen if you've got a file which deterministically causes the hang 
(please try to minimize its size).

Original comment by harmathdenes on 29 Jan 2012 at 5:52

GoogleCodeExporter commented 9 years ago 
I've been doing a lot of tidying up of the file I sent you, without causing the 
hangs I was complaining about. As usually happens, I became over-confident, and 
stopped saving the file as frequently as before, and it started hanging again, 
but much less frequently than before.

Nonetheless, I'm content with the situation, and will get back in touch if I 
should happen to stumble on a way of getting it to hang consistently.

Many thanks.

Original comment by hendry.m...@gmail.com on 29 Jan 2012 at 6:13