Re: [udig-devel] transaction freeze

[andrea antonello <andrea.antonello@xxxxxxxxx>]

I debugged until I wandered through sun classes :)

The lock is in:
ShpFiles.acquireWrite(ShpFileType, FileWriter) line: 508	

It blocks inside
readWriteLock.writeLock().lock();

Inside:
java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock

in the lock method

        public void lock() {
            sync.acquire(1);
        }

I loose it on aquire(1).
No way to recover.

Andrea



On Fri, Aug 27, 2010 at 2:38 PM, Jody Garnett <jody.garnett@xxxxxxxxx> wrote:
> Bleck; that sounds like a deadlock. You should be able to "pause" in the debugger and see what threads are waiting; I am not the best at untangling such things :-(
>
> The commit dialog should be a two phase thing; the first command pops up the dialog; and then the dialog should issue a command that does all the work in the background (can you start by stepping through this process with the debugger and watching when it gets stuck?).
>
> Aside: If we really get stuck and cannot untangle our deadlock we could simplify the problem (prevent user interaction during commit by using a modal commit dialog with the confirmation starting a progress bar...).
>
> Jody
>
> On 27/08/2010, at 9:55 PM, andrea antonello wrote:
>
>> I have a problem with a transaction triggered from the form editor I
>> am writing for shapefiles.
>>
>> What happens is that:
>> - if I modify a value in the usual feature table and then commit,
>> everything works as it should
>> - if I modify with the form view, and the substitute and write the
>> modified feature through:
>>
>>        CompositeCommand compComm = new CompositeCommand();
>>        compComm.getCommands().add(EditCommandFactory.getInstance().createSetEditFeatureCommand(editedFeature));
>>        compComm.getCommands().add(EditCommandFactory.getInstance().createWriteEditFeatureCommand());
>>        context.getMap().sendCommandSync(compComm);
>>
>> Then, as soon as I push the commit button, the commit dialog opens and
>> stays there forever. Gui is frozen and committ hangs somewhere. I am
>> debugging through it and it seems to be in a nirvana inside the
>> DefaultTransaction class.
>>
>> Anyone any idea about how to solve that or why it is happening?
>>
>> Ciao
>> Andrea
>> _______________________________________________
>> User-friendly Desktop Internet GIS (uDig)
>> http://udig.refractions.net
>> http://lists.refractions.net/mailman/listinfo/udig-devel
>
> _______________________________________________
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> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
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