[vtkusers] JVM Crashes while Call vtkGlobalJavaHash.DeleteAll() in Ubuntu...

[Sathish Kumar]

Hi Sebastien,

I tried your code. But the JVM Carsh is done while starting the app. 
(JVM crash occurred While I press the button named "Dicom Multi Planner 
Reconstruction (2D)" in main form).

Here with I attached the java crash report. Any suggestion?

Thanks,
Sathish,


On Thursday 05 May 2011 07:03 PM, Sebastien Jourdain wrote:
> For your linux issue, I really have to try it on my linux, but so far 
> I've tried your stuff at home on my Mac and as I was able to reproduce 
> the leak with the GC, I had no need to go on Linux.
>
> On Thu, May 5, 2011 at 2:04 AM, Sathish Kumar <kingvsk at aol.com 
> <mailto:kingvsk at aol.com>> wrote:
>
>     Hi Sebastien,
>
>     Thanks for your suggestions. But that too not solve my problem. If
>     possible please send the whole code you corrected.
>
>     I have one more question that the same code works great in windows
>     and Mac. The problem is only with linux. Is there any specific
>     reason for that?
>
>     --
>     Sathish
>
>
>     On Thursday 05 May 2011 02:39 AM, Sebastien Jourdain wrote:
>>     Hi Sathish,
>>
>>     after some digging on what was going on with your code, I've
>>     figured out that the memory leak you were facing while using the
>>     VTK garbage collector was mainly due to Java who keep a reference
>>     to any graphical components that have been shown at some point.
>>
>>     And in your case, your graphical frame keep a reference to all
>>     your VTK objects (readers, filters, renderers...). And because of
>>     that, VTK could never release them.
>>
>>     In order to solve your specific issue you have to have some code
>>     like that in your WindowClosed listener:
>>
>>     private void formWindowClosed(java.awt.event.WindowEvent evt) {
>>          this.myVtkObjectA = null;
>>          // [...]
>>          this.myVtkObjectZ = null;
>>
>>          // but also remove the content of you renderer that will keep
>>          // the whole pipeline alive in the C++ layer if not cleared
>>          this.myVtkPanel.RemoveAllViewProps();
>>          this.myVtkPanel.GetRenderer().RemoveAllLights();
>>         
>>     this.myVtkPanel.GetRenderWindow().RemoveRenderer(this.myVtkPanel.GetRenderer());
>>     }
>>
>>     As you may see for vtkPanel we have a similar issue where its
>>     internal component won't be released, and for now in order to
>>     reduce the memory leak you need to execute the lines that I've
>>     put above with "myVtkPanel".
>>
>>     But in a near future, we will add a Delete() method on the
>>     vtkPanel to fully release its internal objects so the code block
>>     could be reduced to : this.myVtkPanel.Delete();
>>
>>     Moreover, Jeff and I are working of documenting the Java part of
>>     VTK and providing some tools to help identifying the cause of
>>     memory leak in Java as well as improving the concurrency
>>     support/management. So if some community member has Java/VTK
>>     testing code that produce error/crash because of concurrency or
>>     memory leak that could be used as test, please send them to us so
>>     we can make sure that the improvement that we are making will
>>     solve your issue.
>>
>>     Thanks,
>>
>>     Seb
>>
>>
>>     On Wed, Apr 27, 2011 at 8:30 AM, Sebastien Jourdain
>>     <sebastien.jourdain at kitware.com
>>     <mailto:sebastien.jourdain at kitware.com>> wrote:
>>
>>         Hi Sathish,
>>
>>         Do you think you can share your source code (offlist) so I
>>         can give a look and understand why you are facing this issue.
>>
>>         Thanks,
>>
>>         Seb
>>
>>         On Wed, Apr 27, 2011 at 2:07 AM, Sathish kumar
>>         <kingvsk at aol.com <mailto:kingvsk at aol.com>> wrote:
>>
>>             Hi Sebastien,
>>
>>             Thanks for your response.
>>
>>                 I developed a simple application that loads a list of
>>             dicom images and construct them as 3D.  It works fine. I
>>             call VTK from my Java Application. If I press a button
>>             from main window, then the VTK output will load in
>>             another Jframe window. Once I close the output window the
>>             VTK should release all the memory. But i doesn't do that.
>>             It will be released only when I close my main
>>             application. (Please refer the attachment).
>>
>>             My Requirement is while I close the 3D window The VTK
>>             memory should be released.
>>
>>              With Regards,
>>
>>             Sathish Kumar V
>>
>>
>>
>
>
>

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