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Bug 104813 - NPE from UndoWatcher
Summary: NPE from UndoWatcher
Status: RESOLVED DUPLICATE of bug 107051
Alias: None
Product: java
Classification: Unclassified
Component: Refactoring (show other bugs)
Version: 6.x
Hardware: All All
: P3 blocker (vote)
Assignee: issues@java
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-05-25 09:46 UTC by _ tboudreau
Modified: 2007-08-14 12:36 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter:

Attachments
messages.log (99.28 KB, application/octet-stream)
2007-06-19 00:42 UTC, _ krystyna 		Details
Add an attachment (proposed patch, testcase, etc.)

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Description _ tboudreau 2007-05-25 09:46:31 UTC 
Haven't seen this in the regular refactorings, but with my own, very often as
the refactoring preview is displayed, the following exception is thrown from a
background thread.  The line where it is thrown is:

UndoManager.getDefault().watch(extractCES(session.getRefactoringElements()), l);

I'm guessing this is some kind of race condition where the session object is not
yet initialized (unless UndoManager.getDefault() is returning null, which I doubt).




java.lang.NullPointerException
	at org.netbeans.modules.refactoring.spi.impl.UndoWatcher.watch(UndoWatcher.java:53)
	at
org.netbeans.modules.refactoring.spi.impl.ParametersPanel$8.run(ParametersPanel.java:332)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539)
[catch] at
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)
Comment 1 Jan Becicka 2007-06-18 14:24:52 UTC 
Please attach whole messages.log
Comment 2 _ krystyna 2007-06-19 00:40:39 UTC 
Also see this NPE when I attempt to refactor a Visual Web page1.java from the Files node.
Attaching my messages.log which contains the NPE stack. I had been refactoring all the Managed
Beans (successfully) from the Projects tab when I switched to the Files tab to refactor
the Page1.java page..

java.lang.NullPointerException
	at org.netbeans.modules.refactoring.spi.impl.UndoWatcher.watch(UndoWatcher.java:53)
	at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$8.run(ParametersPanel.java:332)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)
Comment 3 _ krystyna 2007-06-19 00:42:09 UTC 
Created attachment 43931 [details]
messages.log
Comment 4 Jan Becicka 2007-06-19 06:59:38 UTC 
Probably side effect of 107051

*** This issue has been marked as a duplicate of 107051 ***