jglick opened a new pull request, #9228:
URL: https://github.com/apache/netbeans/pull/9228
Without this patch, opening a particular 16Gb heap dump I have (taken from
Java 21) and clicking on the hyperlink to show threads fails with
```
java.lang.NullPointerException: Cannot invoke
"java.lang.Boolean.booleanValue()" because "daemon" is null
at
org.netbeans.modules.profiler.heapwalk.OverviewController.getStackTrace(OverviewController.java:467)
at
org.netbeans.modules.profiler.heapwalk.OverviewController.computeThreads(OverviewController.java:277)
at
org.netbeans.modules.profiler.heapwalk.ui.OverviewControllerUI$1.run(OverviewControllerUI.java:125)
at …
```
Why the `daemon` field would not be present, I do not know.
With the patch, the threads (about 400) are displayed, although the GUI
freezes for a couple minutes
```
"AWT-EventQueue-0" #39 [54712] prio=6 os_prio=0 cpu=93980.19ms
elapsed=119.05s tid=0x00007921680cb860 nid=54712 runnable [0x0000792189dfc000]
java.lang.Thread.State: RUNNABLE
at
sun.text.RuleBasedBreakIterator.handleNext([email protected]/RuleBasedBreakIterator.java:940)
at
sun.text.RuleBasedBreakIterator.previous([email protected]/RuleBasedBreakIterator.java:639)
at
sun.text.RuleBasedBreakIterator.preceding([email protected]/RuleBasedBreakIterator.java:792)
at
javax.swing.text.GlyphView.getBreakSpot([email protected]/GlyphView.java:792)
at
javax.swing.text.GlyphView.getBreakWeight([email protected]/GlyphView.java:717)
at
javax.swing.text.html.InlineView.getBreakWeight([email protected]/InlineView.java:150)
at
javax.swing.text.FlowView$LogicalView.getPreferredSpan([email protected]/FlowView.java:754)
at
javax.swing.text.FlowView.calculateMinorAxisRequirements([email protected]/FlowView.java:241)
at
javax.swing.text.ParagraphView.calculateMinorAxisRequirements([email protected]/ParagraphView.java:709)
at
javax.swing.text.html.ParagraphView.calculateMinorAxisRequirements([email protected]/ParagraphView.java:162)
at
javax.swing.text.BoxView.checkRequests([email protected]/BoxView.java:936)
at
javax.swing.text.BoxView.getPreferredSpan([email protected]/BoxView.java:546)
at
javax.swing.text.html.ParagraphView.getPreferredSpan([email protected]/ParagraphView.java:258)
at
javax.swing.text.html.LineView.getMinimumSpan([email protected]/LineView.java:74)
at
javax.swing.text.BoxView.calculateMinorAxisRequirements([email protected]/BoxView.java:904)
at
javax.swing.text.html.BlockView.calculateMinorAxisRequirements([email protected]/BlockView.java:146)
at
javax.swing.text.BoxView.checkRequests([email protected]/BoxView.java:936)
at
javax.swing.text.BoxView.getMinimumSpan([email protected]/BoxView.java:569)
at
javax.swing.text.html.BlockView.getMinimumSpan([email protected]/BlockView.java:378)
at
javax.swing.text.BoxView.calculateMinorAxisRequirements([email protected]/BoxView.java:904)
at
javax.swing.text.html.BlockView.calculateMinorAxisRequirements([email protected]/BlockView.java:146)
at
javax.swing.text.BoxView.checkRequests([email protected]/BoxView.java:936)
at
javax.swing.text.BoxView.getMinimumSpan([email protected]/BoxView.java:569)
at
javax.swing.text.html.BlockView.getMinimumSpan([email protected]/BlockView.java:378)
at
javax.swing.text.BoxView.calculateMinorAxisRequirements([email protected]/BoxView.java:904)
at
javax.swing.text.html.BlockView.calculateMinorAxisRequirements([email protected]/BlockView.java:146)
at
javax.swing.text.BoxView.checkRequests([email protected]/BoxView.java:936)
at
javax.swing.text.BoxView.setSpanOnAxis([email protected]/BoxView.java:344)
at
javax.swing.text.BoxView.layout([email protected]/BoxView.java:709)
at
javax.swing.text.BoxView.setSize([email protected]/BoxView.java:398)
at
javax.swing.plaf.basic.BasicTextUI$RootView.setSize([email protected]/BasicTextUI.java:1839)
at
javax.swing.plaf.basic.BasicTextUI.getPreferredSize([email protected]/BasicTextUI.java:959)
at
com.formdev.flatlaf.ui.FlatEditorPaneUI.getPreferredSize(FlatEditorPaneUI.java:223)
at
javax.swing.JComponent.getPreferredSize([email protected]/JComponent.java:1734)
at
javax.swing.JEditorPane.getPreferredSize([email protected]/JEditorPane.java:1392)
at
org.netbeans.lib.profiler.ui.components.HTMLTextArea.getPreferredSize(HTMLTextArea.java:654)
at
javax.swing.ScrollPaneLayout.layoutContainer([email protected]/ScrollPaneLayout.java:799)
at
com.formdev.flatlaf.ui.FlatScrollPaneUI$FlatScrollPaneLayout.layoutContainer(FlatScrollPaneUI.java:563)
at java.awt.Container.layout([email protected]/Container.java:1541)
at java.awt.Container.doLayout([email protected]/Container.java:1530)
at
java.awt.Container.validateTree([email protected]/Container.java:1725)
at java.awt.Container.validate([email protected]/Container.java:1660)
- locked <0x000000041a4b0208> (a java.awt.Component$AWTTreeLock)
at
javax.swing.RepaintManager$3.run([email protected]/RepaintManager.java:757)
at …
```
---
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