Hello,
(please let me know in case I picked the wrong list.)
Since OpenJDK does not ship Default *.ttf font files the change that a JRE is
installed in a way that no System Fonts can be found is quite high.
In OpenJDK8 it is a bit unfortunate that in this situation even for the
headless graphics context that you can can a Java.lang.Error:
I wonder if this is intentional. How About returnign an empty Array or Maybe a
RntimeException instead? In my case by upgrading from Oracle JRE to Open JDK
(in my case Azul) a perfectly fine working Installation is not aborting.
The JasperReports component used is failing does not even need the System Fonts
(which I will report to them seperately). For Zulu it is enough to install
Dejavu Fonts in System Directory or copy them to JRE/lib/fonts/, but I have
also seen OpenJDK builds which seem to use fontmanager libraries instead of
fixed file path. Here I guess the dependency on System config is even higher.
I tested on a minimal System with no X11:
> ls /usr/share/fonts
> cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core)
And my test program (below) Returns for Java 8:
> zulu8*x64/bin/java -cp . FontTest
Are we headless? true
g = sun.java2d.HeadlessGraphicsEnvironment headless: true
Exception in thread "main" java.lang.Error: Probable fatal error:No fonts found.
at
sun.font.SunFontManager.getDefaultPhysicalFont(SunFontManager.java:1236)
at
sun.font.SunFontManager.initialiseDeferredFont(SunFontManager.java:1100)
…
at
sun.font.SunFontManager.getDefaultPhysicalFont(SunFontManager.java:1220)
at
sun.font.SunFontManager.initialiseDeferredFont(SunFontManager.java:1100)
at
sun.font.SunFontManager.initialiseDeferredFonts(SunFontManager.java:927)
at sun.font.SunFontManager.loadFonts(SunFontManager.java:3302)
at sun.awt.X11FontManager.loadFonts(X11FontManager.java:466)
at sun.font.SunFontManager.loadFontFiles(SunFontManager.java:3429)
at
sun.font.SunFontManager.getInstalledFontFamilyNames(SunFontManager.java:3766)
at
sun.java2d.SunGraphicsEnvironment.getAvailableFontFamilyNames(SunGraphicsEnvironment.java:225)
at
sun.java2d.SunGraphicsEnvironment.getAvailableFontFamilyNames(SunGraphicsEnvironment.java:252)
at
sun.java2d.HeadlessGraphicsEnvironment.getAvailableFontFamilyNames(HeadlessGraphicsEnvironment.java:94)
at FontTest.main(FontTest.java:15)
So the error in itself is one topic I wanted to inquire About. However, even
worse in OpenJDK 11 the error seems to have degenerated quite a bit, it Looks
for me:
> zulu11*x64/bin/java -cp . FontTest
Are we headless? true
g = sun.java2d.HeadlessGraphicsEnvironment headless: true
Exception in thread "main" 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.java2d.SunGraphicsEnvironment.getFontManagerForSGE(SunGraphicsEnvironment.java:189)
at
java.desktop/sun.java2d.SunGraphicsEnvironment.getAvailableFontFamilyNames(SunGraphicsEnvironment.java:223)
at
java.desktop/sun.java2d.SunGraphicsEnvironment.getAvailableFontFamilyNames(SunGraphicsEnvironment.java:251)
at
java.desktop/sun.java2d.HeadlessGraphicsEnvironment.getAvailableFontFamilyNames(HeadlessGraphicsEnvironment.java:75)
at FontTest.main(FontTest.java:15)
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)
... 7 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:367)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.desktop/sun.font.SunFontManager.<init>(SunFontManager.java:312)
at java.desktop/sun.awt.FcFontManager.<init>(FcFontManager.java:35)
at java.desktop/sun.awt.X11FontManager.<init>(X11FontManager.java:56)
... 12 mor
If there is no known issue for that, is it worth to file a Bug for it? (I Need
to recreate it with a Oracle OpenJDK binary yet if it is only a fontconfig
Problem – but in that case a null check is probably also a good thing?)
Gruss
Bernd
