[ grinder-Bugs-3459637 ] AWT-EventQueue NullPointerException

Bugs item #3459637, was opened at 2011-12-14 10:28
Message generated for change (Comment added) made by philipa
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Category: Console
Group: None
Status: Pending
Resolution: Fixed
Priority: 5
Private: No
Submitted By: Richard Lynch (richardlynch2)
Assigned to: Philip Aston (philipa)
Summary: AWT-EventQueue NullPointerException

Initial Comment:
This happened when I started up the console today, using the same process as I've used for several weeks on a daily basis.


Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at javax.swing.plaf.basic.BasicTreeUI.ensureRowsAreVisible(BasicTreeUI.java:1881)
	at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2208)
	at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2191)
	at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2149)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3511)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3459)
	at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262)
	at java.awt.Component.processMouseEvent(Component.java:6370)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6138)
	at java.awt.Container.processEvent(Container.java:2085)
	at java.awt.Component.dispatchEventImpl(Component.java:4735)
	at java.awt.Container.dispatchEventImpl(Container.java:2143)
	at java.awt.Component.dispatchEvent(Component.java:4565)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4279)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
	at java.awt.Container.dispatchEventImpl(Container.java:2129)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4565)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:679)
	at java.awt.EventQueue.access$000(EventQueue.java:85)
	at java.awt.EventQueue$1.run(EventQueue.java:638)
	at java.awt.EventQueue$1.run(EventQueue.java:636)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$2.run(EventQueue.java:652)
	at java.awt.EventQueue$2.run(EventQueue.java:650)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:649)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)


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>Comment By: Philip Aston (philipa)
Date: 2012-01-10 14:00

Message:
I've a tentative fix in 3.7 which will be released soonish.

Seeing its rare, I suggest you live with this for now and reopen this
problem if you can reproduce on 3.7.

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Comment By: Richard Lynch (richardlynch)
Date: 2011-12-23 23:08

Message:
It only happened once, and I wouldn't have the slightest idea how to try to
repeat it.

But would be happy to try anything reasonable to reproduce if you can give
me a clue bat.


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Comment By: Philip Aston (philipa)
Date: 2011-12-23 07:40

Message:
Tentatively fixed for 3.7:
http://grinder.git.sourceforge.net/git/gitweb.cgi?p=grinder/grinder;a=commit;h=4f5858d348b6df1ecf88f1d4a27b3e1ec8b46269

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Comment By: Philip Aston (philipa)
Date: 2011-12-23 06:38

Message:
How repeatable is this?

I think it is due to the background file listener not being dispatched in
the Swing worker thread.

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Comment By: Richard Lynch (richardlynch2)
Date: 2011-12-14 10:29

Message:
Sorry: Forgot these:

grinder 3.6

java version "1.6.0_29"
Java(TM) SE Runtime Environment (build 1.6.0_29-b11-402-10M3527)
Java HotSpot(TM) 64-Bit Server VM (build 20.4-b02-402, mixed mode)


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