JDK-6707276 : NPE while displaying PrintDialog from applet.
  • Type: Bug
  • Component: deploy
  • Sub-Component: plugin
  • Affected Version: 6u10
  • Priority: P4
  • Status: Closed
  • Resolution: Cannot Reproduce
  • OS: windows
  • CPU: x86
  • Submitted: 2008-05-27
  • Updated: 2010-04-04
  • Resolved: 2009-01-16
Related Reports
Relates :  
JDK-6813208 - pageDialog throws NPE from applet
Description
NPE while displaying PrintDialog from applet. 

Some times print events are not getting dispatched due to this exception. 

steps to reproduce: 
Load Applet using Plugin2: http://sqindia.india.sun.com/disk17/deployment/raghu/JNLPSupport/JAWSServices/html/JNLPPrintService.html
Click on "Set Page format" button or "Print using javax.jnlp.PrintService" button.



Java Console output:
Exception occurred during event dispatching:
java.lang.NullPointerException: null pData
	at sun.awt.windows.WComponentPeer._requestFocus(Native Method)
	at sun.awt.windows.WComponentPeer.requestFocus(Unknown Source)
	at java.awt.Component.requestFocusHelper(Unknown Source)
	at java.awt.Component.requestFocusHelper(Unknown Source)
	at java.awt.Component.requestFocus(Unknown Source)
	at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.Dialog$1.run(Unknown Source)
	at java.awt.Dialog$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Dialog.show(Unknown Source)
	at java.awt.Component.show(Unknown Source)
	at java.awt.Component.setVisible(Unknown Source)
	at java.awt.Window.setVisible(Unknown Source)
	at java.awt.Dialog.setVisible(Unknown Source)
	at sun.awt.windows.WPrinterJob.pageDialog(Unknown Source)
	at com.sun.jnlp.PrintServiceImpl$2.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.jnlp.PrintServiceImpl.showPageFormatDialog(Unknown Source)
	at JNLPPrintService.setPageFormat(JNLPPrintService.java:55)
	at JNLPPrintService.actionPerformed(JNLPPrintService.java:90)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(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)
NEW page format is: java.awt.print.PageFormat@dc3b82
DEFAULT page format is: java.awt.print.PageFormat@189a773
NEW page format is: java.awt.print.PageFormat@651e95
DEFAULT page format is: java.awt.print.PageFormat@490342
NEW page format is: java.awt.print.PageFormat@e85825
Exception occurred during event dispatching:
java.lang.NullPointerException: null pData
	at sun.awt.windows.WComponentPeer._requestFocus(Native Method)
	at sun.awt.windows.WComponentPeer.requestFocus(Unknown Source)
	at java.awt.Component.requestFocusHelper(Unknown Source)
	at java.awt.Component.requestFocusHelper(Unknown Source)
	at java.awt.Component.requestFocus(Unknown Source)
	at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.Dialog$1.run(Unknown Source)
	at java.awt.Dialog$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Dialog.show(Unknown Source)
	at java.awt.Component.show(Unknown Source)
	at java.awt.Component.setVisible(Unknown Source)
	at java.awt.Window.setVisible(Unknown Source)
	at java.awt.Dialog.setVisible(Unknown Source)
	at sun.awt.windows.WPrinterJob.displayNativeDialog(Unknown Source)
	at sun.awt.windows.WPrinterJob.printDialog(Unknown Source)
	at com.sun.jnlp.PrintServiceImpl$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.jnlp.PrintServiceImpl.doPrinting(Unknown Source)
	at com.sun.jnlp.PrintServiceImpl.print(Unknown Source)
	at JNLPPrintService.print(JNLPPrintService.java:74)
	at JNLPPrintService.actionPerformed(JNLPPrintService.java:88)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(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)
DEFAULT page format is: java.awt.print.PageFormat@1e29b99
Comments
EVALUATION This is no longer reproducible using 6u12 b03 nightly build.
09-01-2009
EVALUATION It looks like somebody requests focus to PrintDialog window, which is one of many unsupported operations with native dialogs in AWT.
27-05-2008