On Linux Alpine we were running in the jtreg awt tests into a lot of NPEs like this :
java.lang.InternalError: java.lang.reflect.InvocationTargetException at java.desktop/sun.font.FontManagerFactory$1.run(FontManagerFactory.java:87) at java.base/java.security.AccessController.doPrivileged(AccessController.java:318) at java.desktop/sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:75) at java.desktop/java.awt.Font.getFont2D(Font.java:526) at java.desktop/java.awt.Font$FontAccessImpl.getFont2D(Font.java:265) at java.desktop/sun.font.FontUtilities.getFont2D(FontUtilities.java:148) at java.desktop/sun.font.GlyphLayout$SDCache.<init>(GlyphLayout.java:254) at java.desktop/sun.font.GlyphLayout$SDCache.get(GlyphLayout.java:328) at java.desktop/sun.font.GlyphLayout.layout(GlyphLayout.java:375) at java.desktop/java.awt.Font.layoutGlyphVector(Font.java:2858) at FontLayoutStressTest.doLayout(FontLayoutStressTest.java:51) at FontLayoutStressTest.main(FontLayoutStressTest.java:57) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:568) at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127) at java.base/java.lang.Thread.run(Thread.java:833) 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:77) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480) at java.desktop/sun.font.FontManagerFactory$1.run(FontManagerFactory.java:85) ... 17 more Caused by: java.lang.NullPointerException: Cannot load from short array because "sun.awt.FontConfiguration.head" is null at java.desktop/sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264) at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:224) at java.desktop/sun.awt.FontConfiguration.init(FontConfiguration.java:106) at java.desktop/sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:706) at java.desktop/sun.font.SunFontManager$2.run(SunFontManager.java:358) at java.desktop/sun.font.SunFontManager$2.run(SunFontManager.java:315) at java.base/java.security.AccessController.doPrivileged(AccessController.java:318) at java.desktop/sun.font.SunFontManager.<init>(SunFontManager.java:315) at java.desktop/sun.awt.FcFontManager.<init>(FcFontManager.java:35) at java.desktop/sun.awt.X11FontManager.<init>(X11FontManager.java:56) ... 23 more Seems this was caused because no fonts were installed on the machine. Probably 'head' in FontConfiguration.getVersion() should be checked for null and a specific exception like "Check your fonts or fonts configuration" should be throw. ------------- Commit messages: - JDK-8304054 Changes: https://git.openjdk.org/jdk/pull/13045/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13045&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8304054 Stats: 9 lines in 1 file changed: 8 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/13045.diff Fetch: git fetch https://git.openjdk.org/jdk pull/13045/head:pull/13045 PR: https://git.openjdk.org/jdk/pull/13045
