[gl4java-usergroup] GL4Java hanging at startup

[Elias N. <na...@od...>]

Hi,

I've recently begun using GL4Java, but I have run into problems with Gl4Java 
sometimes (~ every 10 times) hanging  at startup, my startup code looks like 
this

        frame.setVisible(true);
        GLCapabilities caps = new GLCapabilities(true, false, true, 0, 0, 0, 
0, 0);
        canvas = GLDrawableFactory.getFactory().createGLAnimCanvas(caps, 
Globals.VIEW_WIDTH, Globals.VIEW_HEIGHT);
        canvas.setUseRepaint(false);
        canvas.setUseFpsSleep(false);
        canvas.setUseYield(false);
        canvas.addGLEventListener(renderer);
        frame.add(canvas, BorderLayout.CENTER);
        frame.pack();
        
        canvas.requestFocus();
        canvas.start();

If I move the line frame.sertVisible(true) further down (e.g. after 
canvas.start()), it hangs less often. the thread dump while hanging looks 
like this:Full thread dump Java HotSpot(TM) Client VM (1.4.0-b92 mixed mode):

"AWT-EventQueue-0" prio=1 tid=0x0x81d2cf0 nid=0x2577 runnable 
[4cee6000..4cee686c]
        at gl4java.GLContext.openOpenGLNative(Native Method)
        at gl4java.GLContext.gljInit(GLContext.java:1996)
        - locked <0x441426a0> (a gl4java.GLContext)
        at gl4java.GLContext.createGLContext(GLContext.java:1942)
        at gl4java.GLContext.<init>(GLContext.java:1161)
        at gl4java.GLContext.<init>(GLContext.java:1251)
        at gl4java.awt.GLCanvas.paint(GLCanvas.java:444)
        at sun.awt.RepaintArea.paint(RepaintArea.java:180)
        at sun.awt.motif.MComponentPeer.handleEvent(MComponentPeer.java:339)
        at java.awt.Component.dispatchEventImpl(Component.java:3586)
        at java.awt.Component.dispatchEvent(Component.java:3367)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:445)
        at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:190)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
        at 
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)

"Thread-1" daemon prio=1 tid=0x0x81d53b8 nid=0x2576 waiting on monitor 
[4ce65000..4ce6586c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x44170450> (a java.util.TaskQueue)
        at java.util.TimerThread.mainLoop(Timer.java:429)
        - locked <0x44170450> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:382)

"AWT-Motif" daemon prio=1 tid=0x0x81c2ef8 nid=0x2575 waiting for monitor 
entry [4cde4000..4cde486c]
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java:536)

"AWT-Shutdown" prio=1 tid=0x0x819d550 nid=0x2574 waiting on monitor 
[4cd63000..4cd6386c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x4461a478> (a java.lang.Object)
        at java.lang.Object.wait(Object.java:426)
        at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x4461a478> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:536)

"Signal Dispatcher" daemon prio=1 tid=0x0x807b880 nid=0x2572 waiting on 
monitor [0..0]

"Finalizer" daemon prio=1 tid=0x0x8074478 nid=0x256f waiting on monitor 
[4c2f2000..4c2f286c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x445ef168> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
        - locked <0x445ef168> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=1 tid=0x0x8073830 nid=0x256e waiting on 
monitor [4c271000..4c27186c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x445ef1d0> (a java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:426)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:113)
        - locked <0x445ef1d0> (a java.lang.ref.Reference$Lock)

"main" prio=1 tid=0x0x8051558 nid=0x256b waiting for monitor entry 
[bfffd000..bfffd718]
        at sun.awt.motif.MComponentPeer.pReshape(Native Method)
        at sun.awt.motif.MComponentPeer.setBounds(MComponentPeer.java:739)
        at java.awt.Component.reshape(Component.java:1685)
        - locked <0x44619fb0> (a java.awt.Component$AWTTreeLock)
        at java.awt.Component.setBounds(Component.java:1644)
        at java.awt.BorderLayout.layoutContainer(BorderLayout.java:683)
        - locked <0x44619fb0> (a java.awt.Component$AWTTreeLock)
        at java.awt.Container.layout(Container.java:835)
        at java.awt.Container.doLayout(Container.java:825)
        at java.awt.Container.validateTree(Container.java:903)
        at java.awt.Container.validate(Container.java:878)
        - locked <0x44619fb0> (a java.awt.Component$AWTTreeLock)
        at java.awt.Window.pack(Window.java:418)
        at life3d.Main.run(Main.java:73)
        at life3d.Main.main(Main.java:102)

"VM Thread" prio=1 tid=0x0x80706b0 nid=0x256d runnable

"VM Periodic Task Thread" prio=1 tid=0x0x807a390 nid=0x2570 waiting on monitor
"Suspend Checker Thread" prio=1 tid=0x0x807ae08 nid=0x2571 runnable

it looks like that every time (hang in openOpenGLNative())

I use red hat linux 7.2 with 2.4.17 kernel and nvidia drivers 2314. JVM 
version is 1.4.0 and GL4Java version is 2.8.2.0

someone has advice?  how can I pinpoint it even further? i.e. how can I 
easily tell in which line in openOpenGLNative my app hangs?

 - Elias Naur