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Bug 258287

Summary:	NullPointerException at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI.showSubclassesForClass
Product:	profiler	Reporter:	bartvdc <bartvdc>
Component:	Base	Assignee:	Jiri Sedlacek <jis>
Status:	RESOLVED FIXED
Severity:	normal	Keywords:	VISUALVM
Priority:	P3
Version:	8.1
Hardware:	All
OS:	All
Issue Type:	DEFECT	Exception Reporter:	222919
Attachments:	stacktrace

Description bartvdc 2016-03-09 10:08:41 UTC

Build: NetBeans IDE 8.1 (Build 201510222201)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.60-b23, Java(TM) SE Runtime Environment, 1.8.0_60-b27
OS: Windows 7

User Comments:
bartvdc: profiling, while comparing 2 heapdump




Stacktrace: 
java.lang.NullPointerException
   at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI.showSubclassesForClass(ClassesListControllerUI.java:983)
   at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI.access$1700(ClassesListControllerUI.java:155)
   at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI$7.actionPerformed(ClassesListControllerUI.java:581)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)

Comment 1 bartvdc 2016-03-09 10:08:43 UTC

Created attachment 158783 [details]
stacktrace

Comment 2 Jiri Sedlacek 2016-06-17 14:28:23 UTC

Selecting a heap dump B to compare with the currently viewed heap dump A only computes differences of instance counts and reachable/retained sizes. The rest of functions (like listing subclasses and viewing instances) still shows just the data from heap dump A.

In this case the class selected for listing subclasses was only present in heap dump B and the operation failed by throwing a NPE because the class was unknown to heap dump A.

Comment 3 Jiri Sedlacek 2016-06-17 14:45:35 UTC

Now handled the same way as the Show in Instances View action - a message is displayed that the class is not available in the base heap dump.

Fixed by http://hg.netbeans.org/profiler-main/rev/8c4a1b6b3207.

Comment 4 Quality Engineering 2016-06-29 01:47:15 UTC

Integrated into 'main-silver', will be available in build *201606290002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/8c4a1b6b3207
User: Jiri Sedlacek <jis@netbeans.org>
Log: Bugfix #258287 - do not resolve subclasses of a class not present in the base heap