We had an NPE happen on some linux x64 performance team systems after JDK-8203236, where it turned out we had no fonts installed. I hope the font startup code could detect what's going on and make more useful exception or message than a NullPointerException and related exceptions, shown below.


WARNING: Failed to get info from libfontconfig
Error while creating report: java.lang.reflect.InvocationTargetException
java.lang.InternalError: java.lang.reflect.InvocationTargetException
at java.desktop/sun.font.FontManagerFactory$1.run(FontManagerFactory.java:86)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74)
at java.desktop/sun.font.SunFontManager.getInstance(SunFontManager.java:248)
at java.desktop/sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:265)
at java.desktop/sun.java2d.SunGraphics2D.getFontMetrics(SunGraphics2D.java:856)
at org.jfree.text.G2TextMeasurer.getStringWidth(G2TextMeasurer.java:79)
at org.jfree.text.TextUtilities.nextLineBreak(TextUtilities.java:285)
at org.jfree.text.TextUtilities.createTextBlock(TextUtilities.java:226)
at org.jfree.text.TextUtilities.createTextBlock(TextUtilities.java:197)
at org.jfree.chart.title.TextTitle.arrangeRR(TextTitle.java:489)
at org.jfree.chart.title.TextTitle.arrange(TextTitle.java:450)
at org.jfree.chart.JFreeChart.drawTitle(JFreeChart.java:1261)
at org.jfree.chart.JFreeChart.draw(JFreeChart.java:1151)
at org.jfree.chart.JFreeChart.createBufferedImage(JFreeChart.java:1349)
at org.jfree.chart.JFreeChart.createBufferedImage(JFreeChart.java:1329)
at org.jfree.chart.ChartUtilities.writeChartAsJPEG(ChartUtilities.java:414)
at org.jfree.chart.ChartUtilities.saveChartAsJPEG(ChartUtilities.java:508)
at org.jfree.chart.ChartUtilities.saveChartAsJPEG(ChartUtilities.java:460)
at spec.reporter.Utils.createBmResultGraph(Utils.java:132)
at spec.reporter.ReportGenerator.handleBenchmarkResult(ReportGenerator.java:160)
at spec.reporter.ReportGenerator.handleBenchmarksResults(ReportGenerator.java:105)
at spec.reporter.ReportGenerator.<init>(ReportGenerator.java:87)
at spec.reporter.ReportGenerator.main2(ReportGenerator.java:750)
at spec.reporter.Reporter.main2(Reporter.java:51)
at spec.harness.Launch.createReport(Launch.java:307)
at spec.harness.Launch.runBenchmarkSuite(Launch.java:250)
at spec.harness.Launch.main(Launch.java:452)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.desktop/sun.font.FontManagerFactory$1.run(FontManagerFactory.java:84)
... 27 more
Caused by: java.lang.NullPointerException
at java.desktop/sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1262)
at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:225)
at java.desktop/sun.awt.FontConfiguration.init(FontConfiguration.java:107)
at java.desktop/sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:719)
at java.desktop/sun.font.SunFontManager$2.run(SunFontManager.java:368)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.SunFontManager.<init>(SunFontManager.java:313)
at java.desktop/sun.awt.FcFontManager.<init>(FcFontManager.java:35)
at java.desktop/sun.awt.X11FontManager.<init>(X11FontManager.java:56)
... 32 more