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Bug 258287 - NullPointerException at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI.showSubclassesForClass
Summary: NullPointerException at org.netbeans.modules.profiler.heapwalk.ui.ClassesList...
Status: RESOLVED FIXED
Alias: None
Product: profiler
Classification: Unclassified
Component: Base (show other bugs)
Version: 8.1
Hardware: All All
: P3 normal (vote)
Assignee: Jiri Sedlacek
URL:
Keywords: VISUALVM
Depends on:
Blocks:
 
Reported: 2016-03-09 10:08 UTC by bartvdc
Modified: 2016-06-29 01:47 UTC (History)
0 users

See Also:
Issue Type: DEFECT
Exception Reporter: 222919

Attachments
stacktrace (3.21 KB, text/plain)
2016-03-09 10:08 UTC, bartvdc 		Details
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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