Shutting down Java3D

Is there a proper way to shut down Java3D before calling System.exit()?

When I call System.exit() I get the following exception so it makes me think perhaps I need to shutdown Java3D before calling System.exit():

com.jogamp.opengl.GLException: Error making context 0x40000 current on Thread J3D-Renderer-1, drawableWrite 0x2f011187, drawableRead 0x2f011187, werr: 0, WindowsWGLContext [Version 4.6 (Compat profile, arb, compat[ES2, ES3, ES31, ES32], FBO, hardware) - 4.6.0 NVIDIA 432.00 [GL 4.6.0, vendor 432.0.0 (NVIDIA 432.00)], options 0x7c03, this 0x6a3a1c, handle 0x40000, isShared false, jogamp.opengl.gl4.GL4bcImpl@146cb8a,
         quirks: [NoDoubleBufferedBitmap, NoSurfacelessCtx],
        Drawable: ResizeableImpl[Initialized true, realized true, texUnit 0, samples 8,
        Factory   jogamp.opengl.windows.wgl.WindowsWGLDrawableFactory@1315fe,
        Handle    0x2f011187,
        Caps      GLCaps[wgl vid 9 arb: rgba 8/8/8/8, opaque, accum-rgba 16/16/16/16, dp/st/ms 24/0/8, sample-ext default, dbl, mono  , hw, GLProfile[GL4bc/GL4bc.hw], offscr[fbo]],
        fboI back 0, front 0, num 1,
        FBO front read 2, FBO[name r/w 2/2, init true, bound true, size 894x862, samples 0/32, modified false/false, depth RenderAttachment[type DEPTH, format 0x81a6, samples 0, 894x862, name 0x3, obj 0x1c1bf4], stencil null, colorbuffer attachments: 1/8, with 1 textures: [TextureAttachment[type COLOR_TEXTURE, target GL_TEXTURE_2D, level 0, format 0x8058, 894x862, border 0, dataFormat 0x80e1, dataType 0x8367; min/mag 0x2600/0x2600, wrap S/T 0x812f/0x812f; name 0x1, obj 0x1eaac1], null, null, null, null, null, null, null], msaa[null, hasSink false, dirty true], state OK, obj 0x1b7e760],
        FBO back  write 1, FBO[name r/w 1/2, init true, bound true, size 894x862, samples 8/32, modified false/false, depth RenderAttachment[type DEPTH, format 0x81a6, samples 8, 894x862, name 0x2, obj 0x11592af], stencil null, colorbuffer attachments: 1/8, with 0 textures: [ColorAttachment[type COLOR, format 0x8058, samples 8, 894x862, name 0x1, obj 0x586647], null, null, null, null, null, null, null], msaa[TextureAttachment[type COLOR_TEXTURE, target GL_TEXTURE_2D, level 0, format 0x8058, 894x862, border 0, dataFormat 0x80e1, dataType 0x8367; min/mag 0x2600/0x2600, wrap S/T 0x812f/0x812f; name 0x1, obj 0x1eaac1], hasSink true, dirty true], state OK, obj 0x1f2f4c2],
        Surface   GDISurface[ displayHandle 0x0
, surfaceHandle 0x2f011187
, size 894x862
, UOB[ OWNS_SURFACE | OWNS_DEVICE | WINDOW_INVISIBLE ]
, WindowsWGLGraphicsConfiguration[DefaultGraphicsScreen[WindowsGraphicsDevice[type .windows, connection decon, unitID 0, handle 0x0, owner false, NullToolkitLock[obj 0xa5ad8b]], idx 0], pfdID 9, ARB-Choosen true,
        requested GLCaps[rgba 8/8/8/8, opaque, accum-rgba 16/16/16/16, dp/st/ms 24/0/8, sample-ext default, dbl, mono  , hw, GLProfile[GL4bc/GL4bc.hw], offscr[fbo]],
        chosen    GLCaps[wgl vid 9 arb: rgba 8/8/8/8, opaque, accum-rgba 16/16/16/16, dp/st/ms 24/0/8, sample-ext default, dbl, mono  , hw, GLProfile[GL4bc/GL4bc.hw], offscr[fbo]]]
, surfaceLock <5b9ba3, 107e6b8>[count 2, qsz 0, owner <J3D-Renderer-1>]
, GDIDummyUpstreamSurfaceHook[pixel 894x862]
, upstreamSurface false ]]]
        at jogamp.opengl.windows.wgl.WindowsWGLContext.makeCurrentImpl(WindowsWGLContext.java:442)
        at jogamp.opengl.GLContextImpl.makeCurrentWithinLock(GLContextImpl.java:840)
        at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:648)
        at jogamp.opengl.GLContextImpl.makeCurrent(GLContextImpl.java:586)
        at org.jogamp.java3d.JoglPipeline.useCtx(JoglPipeline.java:7264)
        at org.jogamp.java3d.Canvas3D.useCtx(Canvas3D.java:4861)
        at org.jogamp.java3d.Canvas3D.makeCtxCurrent(Canvas3D.java:2423)
        at org.jogamp.java3d.Canvas3D.makeCtxCurrent(Canvas3D.java:2406)
        at org.jogamp.java3d.Renderer.doWork(Renderer.java:997)
        at org.jogamp.java3d.J3dThread.run(J3dThread.java:271)

During a regular life cycle the Java3D system is cleanly tidied up at the end of it's life by the AWT system calling the
Canvas3D.removeNotify();

This is an overridden method of Canvas which shuts down the 3d renderer system nicely.

removeNotify() is a blocking call so if you are shutting down in a hard manner where the length of time you have to clean up may be short and you need a non-blocking call that will tidy up somewhat, then you can call
Canvas3D.stopRenderer();

which will tell the 3d Renderer thread to shut down but won't block the calling thread.

Note there is also
SimpleUniverse.cleanup();
Which will release some memory, but is not useful during a forced shutdown.

I hope this helps.
Phil.

Beautiful, "Canvas3D.removeNotify()" did the trick. Thank you.
I'm calling it from Javafx thread instead of AWT thread. But it seem to work fine regardless.