ChartMacro - could not initialize class org.jfree.chart.JFreeChart (.deb package)

Short description:

The "ChartMacro" isn't working on a clean install of "XWiki 11.10.2" as ".deb" package on Ubuntu 18.04.3 (server - headless).

Problem:

• Installed XWiki
• Configured XWiki
• created a site with an Chart
  content:

{{chart type="pie" source="inline" params="range:B2-D5;series:columns;" title="Chart Test" width="320" height="240"}}
|=|=X|=Y|=Z
|Q1|1.2|3.4|1.3
|Q2|4.5|3.4|2.3
|Q3|1.2|4.5|9.0
|Q4|3.4|1.2|1.2
{{/chart}}

• Chart is not display, instead you get an error message:

java.lang.NoClassDefFoundError: Could not initialize class org.jfree.chart.JFreeChart

Solution:

• Edit /etc/java-8-openjdk/accessibility.properties
  (Java 11:{{ /etc/java-11-openjdk/accessibility.properties}})
• comment out (deactivate) this line:

  #assistive_technologies=org.GNOME.Accessibility.AtkWrapper

• restart Tomcat
• Chart is now properly displayed{{}}
  

Additional Information:
see:

• https://forum.xwiki.org/t/chartmacro-could-not-initialize-class-org-jfree-chart-jfreechart/6058/15
• https://github.com/microsoft/vscode-arduino/issues/644
• https://extensions.xwiki.org/xwiki/bin/view/Extension/Chart%20Macro?viewer=comments#xwikicomment_14