RE: [udig-devel] Various Rendering Issues

["Leigh Fitzgibbon" <leigh.fitzgibbon@xxxxxxxxxxxx>]

Here you go, a stack trace for c):

java.lang.NullPointerException
	at
net.refractions.udig.project.internal.render.impl.RenderContextImpl.clearIma
ge(RenderContextImpl.java:218)
	at
net.refractions.udig.project.internal.render.impl.CompositeRendererImpl.refr
eshImage(CompositeRendererImpl.java:228)
	at
net.refractions.udig.project.internal.render.impl.CompositeRendererImpl.refr
eshImage(CompositeRendererImpl.java:214)
	at
net.refractions.udig.project.internal.render.impl.RenderExecutorComposite$Co
mpositeRendererJob.incrementalUpdate(RenderExecutorComposite.java:198)
	at
net.refractions.udig.project.internal.render.impl.RenderExecutorComposite$Co
mpositeRendererJob.startRendering(RenderExecutorComposite.java:151)
	at
net.refractions.udig.project.internal.render.impl.RenderJob.run(RenderJob.ja
va:192)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

I achieved this error by opening a map containing a single layer stored in a
PostgreSQL database and then closing the view as soon as possible.  But from
the look of the stack trace the data source probably doesn't matter.  The
layer is quite large and normally takes about 5 seconds to render.  This
looks like a relatively straightforward bug.  

Any ideas for a) or b)?

Re: the company, Vince Darley has been posting to the list occasionally over
the last couple of years.  I've just started posting.

Cheers,
Leigh

-----Original Message-----
From: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx
[mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Jody Garnett
Sent: Monday, 3 December 2007 2:20 PM
To: User-friendly Desktop Internet GIS
Subject: Re: [udig-devel] Various Rendering Issues

Leigh Fitzgibbon wrote:
>
> I don’t have a concrete case here for investigation but I often 
> observe the following annoyances:
>  
>
> a)  UDig map does not render – the map view comes up blank.  Hitting 
> redraw causes the map to draw correctly.
>
> b)  UDig "rendering map" job active even when no rendering is 
> obviously going on (CPU usage is zero).
>
> c)  Closing a map view while it is rendering sometimes causes an error 
> dialog to pop-up reporting “NullpointerException” but nothing else.
>
>  
>
> These things don’t go down to well at client demonstrations.  L
>
Fair enought.  
>
> We are using UDig 1.1 RC13 with PostgreSQL.  Are these problems normal 
> or is there something in our environment that is causing trouble? 
>
Nope these would all be bugs; of one flavor or another. can you give us 
some clues as to what was happening when you experienced these glitches.

I have not heard of your company before; looks like you guys do some 
interesting work. If you need anything specific please give us a call, 
and for bugs such as the above let's work though them on the email list 
here and see if we can isolate them.

A couple of questions; are you *just* using PostgreSQL; or were you 
working with shapefiles and WMS layers at the same time. Were you 
editing at the time (my usual source of redraw difficulties).  Out of 
all the ones you listed above I am really interested in getting a stack 
trace for (c) above.

Cheers,
Jody
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel

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