Using the { shortcut to add a macro fails with 'java.lang.ArrayIndexOutOfBoundsException: 0' error

Summary

Attempting to insert a macro using the { shortcut fails.

Environment

• Red Hat Enterprise Linux (RHEL) 7.4

Steps to Reproduce

1. Edit a page
2. Attempt to add a macro using the { shortcut

Expected Results

The macro suggestions menu is shown

Actual Results

The following error is displayed in the browser

The below exception is thrown in the atlassian-confluence.log file:

2017-08-24 11:25:44,364 ERROR [http-nio-8090-exec-18] [ContainerBase.[Standalone].[localhost].[/]] log Unhandled exception occurred whilst decorating page
 -- referer: http://confluence:8090/pages/resumedraft.action?draftId=4096191&draftShareId=ceb30906-49f4-4e30-af94-c6c6c363f1df | url: /plugins/servlet/confluence/placeholder/macro | traceId: b23e4a0f2ec9b8cd | userName: admin
java.lang.ArrayIndexOutOfBoundsException: 0
	at sun.font.CompositeStrike.getStrikeForSlot(CompositeStrike.java:75)
	at sun.font.CompositeStrike.getFontMetrics(CompositeStrike.java:93)
	at sun.font.FontDesignMetrics.initMatrixAndMetrics(FontDesignMetrics.java:359)
	at sun.font.FontDesignMetrics.<init>(FontDesignMetrics.java:350)
	at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:302)
	at sun.java2d.SunGraphics2D.getFontMetrics(SunGraphics2D.java:863)
	at 

Notes

The default font was changed from Utopia to Styx in RHEL 7.4, this is not handled well by the JVM and breaks functionality. For more information see Bug 1484079 – AWT java apps fail to start when stix-fonts is used as sans-serif font

Workaround

1. Stop Confluence
2. Create /etc/fonts/local.conf
3. Paste the following:

   <?xml version='1.0'?>
   <!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
   <fontconfig>
     <alias>
       <family>serif</family>
       <prefer><family>Utopia</family></prefer>
     </alias>
     <alias>
       <family>sans-serif</family>
       <prefer><family>Utopia</family></prefer>
     </alias>
     <alias>
       <family>monospace</family>
       <prefer><family>Utopia</family></prefer>
     </alias>
     <alias>
       <family>dialog</family>
       <prefer><family>Utopia</family></prefer>
     </alias>
     <alias>
       <family>dialoginput</family>
       <prefer><family>Utopia</family></prefer>
     </alias>
   </fontconfig>
   

4. Save the file
5. Start Confluence
   • In some cases, the fonts are not installed and we'll still run into these errors. Use the method appropriate for your distribution to install these fonts, for example:

     sudo yum install dejavu-serif-fonts