Java fx程序冻结

Question

这可能是java fx中的一个bug，我可能会提交一份报告，但我想首先了解更多关于它的情况，因为根据我的经验，没有提供复制方法的bug是不会被发现的。另外，我真的很想要一份工作。

所以冻结是随机发生的，而且可能是我第15次打开程序的时候。这种情况大多发生在节目开始时。程序是这，使用java 11和openjfx 11。冻结发生在Windows上(可能也发生在Unix上，谁知道)。

java应用程序线程等待呈现完成，但呈现从未完成(可能在这里循环运行)。

​

下面是呈现-线程的线程转储，该线程似乎在循环中运行：

QuantumRenderer-0  Runnable CPU usage on sample: 1s
  com.sun.marlin.DHelpers.subdivideAt(double, double[], int, double[], int, double[], int, int) DHelpers.java:419
  com.sun.marlin.DDasher.somethingTo(int) DDasher.java:410
  com.sun.marlin.DDasher.curveTo(double, double, double, double, double, double) DDasher.java:749
  com.sun.prism.impl.shape.DMarlinPrismUtils.feedConsumer(DRendererContext, Path2D, BaseTransform, DPathConsumer2D) DMarlinPrismUtils.java:561
  com.sun.prism.impl.shape.DMarlinPrismUtils.setupRenderer(DRendererContext, Shape, BasicStroke, BaseTransform, Rectangle, boolean) DMarlinPrismUtils.java:286
  com.sun.prism.impl.shape.DMarlinRasterizer.getMaskData(Shape, BasicStroke, RectBounds, BaseTransform, boolean, boolean) DMarlinRasterizer.java:86
  com.sun.prism.impl.shape.ShapeUtil.rasterizeShape(Shape, BasicStroke, RectBounds, BaseTransform, boolean, boolean) ShapeUtil.java:64
  com.sun.prism.impl.ps.BaseShaderGraphics.renderShape(Shape, BasicStroke, float, float, float, float) BaseShaderGraphics.java:463
  com.sun.prism.impl.BaseGraphics.draw(Shape) BaseGraphics.java:402
  com.sun.javafx.webkit.prism.WCGraphicsPrismContext$17.doPaint(Graphics) WCGraphicsPrismContext.java:1761
  com.sun.javafx.webkit.prism.WCGraphicsPrismContext$Composite.paint(Graphics) WCGraphicsPrismContext.java:1512
  com.sun.javafx.webkit.prism.WCGraphicsPrismContext$Composite.paint() WCGraphicsPrismContext.java:1497
  com.sun.javafx.webkit.prism.WCGraphicsPrismContext.strokePath(WCPath) WCGraphicsPrismContext.java:1764
  com.sun.webkit.graphics.GraphicsDecoder.decode(WCGraphicsManager, WCGraphicsContext, BufferData) GraphicsDecoder.java:278
  com.sun.webkit.graphics.WCRenderQueue.decode(WCGraphicsContext) WCRenderQueue.java:92
  com.sun.webkit.WebPage.paint2GC(WCGraphicsContext) WebPage.java:734
  com.sun.webkit.WebPage.paint(WCGraphicsContext, int, int, int, int) WebPage.java:701
  com.sun.javafx.sg.prism.web.NGWebView.renderContent(Graphics) NGWebView.java:96
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.renderForClip(Graphics) NGNode.java:2313
  com.sun.javafx.sg.prism.NGNode.renderRectClip(Graphics, NGRectangle) NGNode.java:2207
  com.sun.javafx.sg.prism.NGNode.renderClip(Graphics) NGNode.java:2233
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2066
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.sg.prism.NGGroup.renderContent(Graphics) NGGroup.java:270
  com.sun.javafx.sg.prism.NGRegion.renderContent(Graphics) NGRegion.java:578
  com.sun.javafx.sg.prism.NGNode.doRender(Graphics) NGNode.java:2072
  com.sun.javafx.sg.prism.NGNode.render(Graphics) NGNode.java:1964
  com.sun.javafx.tk.quantum.ViewPainter.doPaint(Graphics, NodePath) ViewPainter.java:479
  com.sun.javafx.tk.quantum.ViewPainter.paintImpl(Graphics) ViewPainter.java:328
  com.sun.javafx.tk.quantum.PresentingPainter.run() PresentingPainter.java:91
  java.util.concurrent.Executors$RunnableAdapter.call() Executors.java:514
  java.util.concurrent.FutureTask.runAndReset() FutureTask.java:305
  com.sun.javafx.tk.RenderJob.run() RenderJob.java:58
  java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) ThreadPoolExecutor.java:1135
  java.util.concurrent.ThreadPoolExecutor$Worker.run() ThreadPoolExecutor.java:635
  com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run() QuantumRenderer.java:125
  java.lang.Thread.run() Thread.java:844

其中一个应用程序线程：

JavaFX Application Thread  Waiting CPU usage on sample: 0ms
  jdk.internal.misc.Unsafe.park(boolean, long) Unsafe.java (native)
  java.util.concurrent.locks.LockSupport.park(Object) LockSupport.java:194
  java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt() AbstractQueuedSynchronizer.java:883
  java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(int) AbstractQueuedSynchronizer.java:1037
  java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(int) AbstractQueuedSynchronizer.java:1343
  java.util.concurrent.CountDownLatch.await() CountDownLatch.java:232
  com.sun.javafx.tk.quantum.PaintCollector.waitForRenderingToComplete() PaintCollector.java:157
  com.sun.javafx.tk.quantum.GlassScene.waitForRenderingToComplete() GlassScene.java:122
  javafx.scene.Scene$ScenePulseListener.pulse() Scene.java:2528
  com.sun.javafx.tk.Toolkit.lambda$runPulse$2(TKPulseListener) Toolkit.java:410
  com.sun.javafx.tk.Toolkit$$Lambda$941.run()
  java.security.AccessController.doPrivileged(PrivilegedAction, AccessControlContext) AccessController.java (native)
  com.sun.javafx.tk.Toolkit.runPulse(TKPulseListener, AccessControlContext) Toolkit.java:409
  com.sun.javafx.tk.Toolkit.firePulse() Toolkit.java:436
  com.sun.javafx.tk.quantum.QuantumToolkit.pulse(boolean) QuantumToolkit.java:518
  com.sun.javafx.tk.quantum.QuantumToolkit.pulse() QuantumToolkit.java:498
  com.sun.javafx.tk.quantum.QuantumToolkit.pulseFromQueue() QuantumToolkit.java:491
  com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$11() QuantumToolkit.java:319
  com.sun.javafx.tk.quantum.QuantumToolkit$$Lambda$98.run()
  com.sun.glass.ui.InvokeLaterDispatcher$Future.run() InvokeLaterDispatcher.java:96
  com.sun.glass.ui.win.WinApplication._runLoop(Runnable) WinApplication.java (native)
  com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(int, Runnable) WinApplication.java:175
  com.sun.glass.ui.win.WinApplication$$Lambda$94.run()
  java.lang.Thread.run() Thread.java:844

这里是来自cpu分析的屏幕截图：

​

和包含相应数据的文件：https://drive.google.com/file/d/1k4t5Q4pgkAvvnnLGx3sph345ccdjYg5W/view?usp=sharing

我还能查到些什么呢？我想知道是什么UI元素导致了这一点，这样我就可以构建一个最小的可复制示例。

Answer 1

我们所加载的网站似乎有一个用于加载的动画：

<div id="imageLoadingDiv">
  <style>
    .loader {
      width: 100px;
      height: 100px;
    }

    .circular{
      animation: rotate 2s linear infinite;
      height: 100px;
      position: relative;
      width: 100px;
    }

    .path {
      stroke-dasharray: 1px,200px;
      stroke-dashoffset: 0;
      animation:
          dash 1.5s ease-in-out infinite,
          color 6s ease-in-out infinite
    ;
      stroke-linecap: round;
    }

    @keyframes rotate{
      100%{
        transform: rotate(360deg);
      }
    }
    @keyframes dash{
      0%{
        stroke-dasharray: 1px,200px;
        stroke-dashoffset: 0;
      }
      50%{
        stroke-dasharray: 89px,200px;
        stroke-dashoffset: -35;
      }
      100%{
        stroke-dasharray: 89px,200px;
        stroke-dashoffset: -124;
      }
    }
    @keyframes color{
      100%, 0%{
        stroke: #d62d20;
      }
      40%{
        stroke: #0057e7;
      }
      66%{
        stroke: #008744;
      }
      80%, 90%{
        stroke: #ffa700;
      }
    }
  </style>
  <div class="loader">
    <svg class="circular">
      <circle class="path" cx="50" cy="50" r="20" fill="none" stroke-width="2" stroke-miterlimit="10"/>
    </svg>
  </div>
</div>

取代它似乎确实消除了这个问题。