[vtkusers] Java servlet + Glassfish + volume rendering applications problem

[Emptystack]

Hello everyone! I have developed  a rendering engine (using vtk's
java-wrapped classes) which can accept users' events like mouse coordinates
and then generate the resulting image. It works well when it is run as pure
java applications. But when I deployed it into glassfish web server by Java
servlet technology, something unexpected happened. When I send the first
request (from our developed HTML5 web-based medical image viewer) to the web
server, everything works well and we can also get the rendering image. But
when I  send  a request to the web server again, my web server stopped  at
the point of vtkRenderWindow::Render(). In a word, In a java servlet
environment, the first request to this method works very well, but the
second request failed. 

I have been tormented by this problem for a long time. Hope someone can help
me! 

Best wishes!



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