DO NOT REPLY [Bug 31910] New: - Null Pointer Exception when disabling Http Samplers

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http://issues.apache.org/bugzilla/show_bug.cgi?id=31910

Null Pointer Exception when disabling Http Samplers

           Summary: Null Pointer Exception when disabling Http Samplers
           Product: JMeter
           Version: Nightly (Please specify date)
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Main
        AssignedTo: jmeter-dev@jakarta.apache.org
        ReportedBy: andrew.r.bredhauer@transport.qld.gov.au


I've got a test plan in which I've disabled a number of http samplers. Now 
when I load the test plan and expand the Thread Group I get a null pointer 
exception (below) and the GUI fails to render correctly from that point 
onwards. I've attached the test plan for debuggin purposes.

Andrew

java.lang.NullPointerException
        at sun.java2d.pipe.DrawImage.copyImage(Unknown Source)
        at sun.java2d.pipe.DrawImage.copyImage(Unknown Source)
        at sun.java2d.SunGraphics2D.drawImage(Unknown Source)
        at sun.awt.image.ImageRepresentation.drawToBufImage(Unknown Source)
        at sun.java2d.pipe.DrawImage.copyImage(Unknown Source)
        at sun.java2d.SunGraphics2D.drawImage(Unknown Source)
        at sun.java2d.SunGraphics2D.drawImage(Unknown Source)
        at javax.swing.ImageIcon.paintIcon(Unknown Source)
        at javax.swing.plaf.basic.BasicLabelUI.paint(Unknown Source)
        at javax.swing.plaf.ComponentUI.update(Unknown Source)
        at javax.swing.JComponent.paintComponent(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.tree.DefaultTreeCellRenderer.paint(Unknown Source)
        at javax.swing.CellRendererPane.paintComponent(Unknown Source)
        at javax.swing.plaf.basic.BasicTreeUI.paintRow(Unknown Source)
        at javax.swing.plaf.basic.BasicTreeUI.paint(Unknown Source)
        at javax.swing.plaf.metal.MetalTreeUI.paint(Unknown Source)
        at javax.swing.plaf.ComponentUI.update(Unknown Source)
        at javax.swing.JComponent.paintComponent(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JViewport.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JSplitPane.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at javax.swing.JLayeredPane.paint(Unknown Source)
        at javax.swing.JComponent.paintChildren(Unknown Source)
        at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source)
        at javax.swing.JComponent.paintDoubleBuffered(Unknown Source)
        at javax.swing.JComponent.paint(Unknown Source)
        at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
        at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
        at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
        at java.awt.Container.paint(Unknown Source)
        at javax.swing.JFrame.update(Unknown Source)
        at sun.awt.RepaintArea.paint(Unknown Source)
        at sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown 
Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

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