Null Pointer Exception at sun.awt.X11FontManager.getFontPath(X11FontManager.java)

vubranga79-Oracle

Trying to look for any clues on a simple Graphics code which is reporting Null Pointer Exception with the stack below :

java.lang.NullPointerException

    at sun.awt.X11FontManager.getFontPath(X11FontManager.java)

    at sun.font.SunFontManager.getPlatformFontPath(SunFontManager.java)

    at sun.awt.X11FontManager.getFileNameFromPlatformName(X11FontManager.java)

    at sun.font.SunFontManager.initCompositeFonts(SunFontManager.java)

    at sun.font.SunFontManager.access$700(SunFontManager.java)

    at sun.font.SunFontManager$2.run(SunFontManager.java)

    at java.security.AccessController.doPrivileged(Native Method)

    at sun.font.SunFontManager.<init>(SunFontManager.java)

    at sun.awt.FcFontManager.<init>(FcFontManager.java)

    at sun.awt.X11FontManager.<init>(X11FontManager.java)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java)

    at java.lang.reflect.Constructor.newInstance(Constructor.java)

    at java.lang.Class.newInstance(Class.java)

    at sun.font.FontManagerFactory$1.run(FontManagerFactory.java)

    at java.security.AccessController.doPrivileged(Native Method)

    at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java)

    at java.awt.Font.getFont2D(Font.java)

    at java.awt.Font.defaultLineMetrics(Font.java)

    at java.awt.Font.getLineMetrics(Font.java)

"sun.awt.X11FontManager.getFontPath" is defined on X11FontManager.java which is available here :

http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/7eae7c89dab4/src/solaris/classes/sun/awt/X11FontManager.java

This is on AIX with Java version :

java version "1.8.0_191"

Java(TM) SE Runtime Environment (build 8.0.5.27 - pap6480sr5fp27-20190104_01(SR5 FP27))

IBM J9 VM (build 2.9, JRE 1.8.0 AIX ppc64-64-Bit Compressed References 20181219_405297 (JIT enabled, AOT enabled)

OpenJ9 - 3f2d574

OMR   - 109ba5b

IBM   - e2996d1)

JCL - 20190104_01 based on Oracle jdk8u191-b26

Sample program to recreate this error is attached. We compile and run this within the Oracle database , however something similar from the command line also reports the same stack.

We have checked DISPLAY is not set , this is a HeadLess environment and the Font packages are installed.

test_fonts_script_code.txt

This appears to be an environment specific issue as the same code appears to be working on other AIX boxes with an similar JDK setup.

Would appreciate any pointers / things to check to get past this Null Pointer exception