This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.

Bug 130354

Summary:	NullPointerException at org.netbeans.spi.project.ui.support.NodeFactorySupport$DelegateChildren.addNotify
Product:	projects	Reporter:	_ pcw <pcw>
Component:	Generic Projects UI	Assignee:	Milos Kleint <mkleint>
Status:	RESOLVED FIXED
Severity:	blocker	CC:	t_h
Priority:	P3
Version:	6.x
Hardware:	All
OS:	All
URL:	http://statistics.netbeans.org/exceptions/detail.do?id=27861
Issue Type:	DEFECT	Exception Reporter:	27861
Bug Depends on:	193065
Bug Blocks:
Attachments:	stacktrace

Description _ pcw 2008-03-18 02:00:25 UTC

Build: NetBeans IDE Dev (Build 080313)
VM: Java HotSpot(TM) Client VM, 10.0-b19
OS: SunOS, 5.10, x86

User Comments: 
Opened a project node that was closed.

Comment 1 _ pcw 2008-03-18 02:00:34 UTC

Created attachment 58534 [details]
stacktrace

Comment 2 Milan Kubec 2008-03-18 09:25:31 UTC

I don't know how the result could be null (lazy project loading?). Milosi, you know more about this code than I do.

Comment 3 Milos Kleint 2008-03-18 09:54:51 UTC

the only way to get the NPE in this place is the situation when removeNotify() is called within the time the addNotify()
call is processing.

Comment 4 Milos Kleint 2008-03-18 11:34:18 UTC

fixed the immediate problem by synchronization. On a more general level, it's questionable if removeNotify() shall be
allowed to execute while addNotify() is running.
http://hg.netbeans.org/main/rev/1f70f13bd8f8