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Bug 205268

Summary:	[71cat] NullPointerException at org.netbeans.modules.projectapi.LazyLookupProviders$1$1.beforeLookup
Product:	projects	Reporter:	tim_sa <tim_sa>
Component:	Generic Infrastructure	Assignee:	Jesse Glick <jglick>
Status:	RESOLVED FIXED
Severity:	normal	CC:	jtulach, musilt2
Priority:	P3	Keywords:	THREAD
Version:	7.1
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	178274
Bug Depends on:	205533
Bug Blocks:
Attachments:	stacktrace

Description tim_sa 2011-11-18 08:25:34 UTC

Build: NetBeans IDE Dev (Build 201111160600)
VM: Java HotSpot(TM) Client VM, 21.1-b02, Java(TM) SE Runtime Environment, 1.7.0_01-b08
OS: Windows 7

User Comments:
GUEST: abrindo o programa.




Stacktrace: 
java.lang.NullPointerException
   at org.netbeans.modules.projectapi.LazyLookupProviders$1$1.beforeLookup(LazyLookupProviders.java:80)
   at org.openide.util.lookup.ProxyLookup$R.myBeforeLookup(ProxyLookup.java:672)
   at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:526)
   at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:497)
   at org.openide.util.lookup.ProxyLookup$R.collectFires(ProxyLookup.java:634)
   at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:168)

Comment 1 tim_sa 2011-11-18 08:25:39 UTC

Created attachment 113304 [details]
stacktrace

Comment 2 Jesse Glick 2011-11-18 16:08:06 UTC

Is it possible for there to be concurrent calls to beforeLookup on a single ProxyLookup? They really need to be synchronized since this is used for lazy initialization of lookup contents that needs to be at most once per lookup. From looking at the code it seems that synchronizing on the ProxyLookup object ought to be safe, so I will try that, though I am surprising that it is not already called with that monitor held.

Comment 3 Jesse Glick 2011-11-18 16:10:01 UTC

core-main #821eb8a8e979

Comment 4 Quality Engineering 2011-11-20 16:37:28 UTC

Integrated into 'main-golden'
Changeset: http://hg.netbeans.org/main-golden/rev/821eb8a8e979
User: Jesse Glick <jglick@netbeans.org>
Log: #205268: [71cat] NullPointerException at org.netbeans.modules.projectapi.LazyLookupProviders$1$1.beforeLookup

Comment 5 Jesse Glick 2012-04-13 00:11:39 UTC

*** Bug 211112 has been marked as a duplicate of this bug. ***