This is the release notes for XWiki Commons, XWiki Rendering and XWiki Platform. They share the same release notes as they are released together and have the same version.

This is a bugfix release that covers important issues that we have discovered since 12.6.2 has been released.

New and Noteworthy (since XWiki 12.6.2)

Full list of issues fixed and Dashboard for 12.6.3.

Translations

The following translations have been updated:

• Spanish
• French
• Norwegian
• Russian
• Simplified Chinese

Tested Browsers & Databases

Here is the list of browsers we support and how they have been tested for this release:

	Browser	Tested on:
	Google Chrome 86	Not Tested
	Microsoft Edge 86	Not Tested
	Mozilla Firefox 81	Jira Tickets Marked as Fixed in the Release Notes Tests run and results
	Internet Explorer 11
	Safari 14	Not Tested

Here is the list of databases we support and how they have been tested for this release:

	Database	Tested on:
	HyperSQL 2.5.1	Not Tested
	Oracle 19c	Not Tested
	MySQL 8	Tests run and results
	MariaDB 10.5
	PostgreSQL 12	Jira Tickets Marked as Fixed in the Release Notes

Here is the list of Servlet Containers we support and how they have been tested for this release:

	Servlet Container	Tested on:
	Tomcat 9.0.39	Jira Tickets Marked as Fixed in the Release Notes Tests run and results
	Jetty 9.4.29 (XWiki Standalone packaging)
	Jetty 9.4.29	Not Tested

Known issues

• Bugs we know about

Backward Compatibility and Migration Notes

General Notes

• When upgrading make sure you compare and merge the following XWiki configuration files since some parameters may have been modified, removed or added:
  • xwiki.cfg
  • xwiki.properties
  • web.xml
  • hibernate.cfg.xml
• Add xwiki.store.migration=1 in xwiki.cfg so that XWiki will attempt to automatically migrate your current database to any new schema. Make sure you backup your Database before doing anything.

API Breakages

The following APIs were modified since XWiki 12.6.2:

• Source breakage but not a backward compatible one. We consider it's acceptable
  • Violation type:
    java.class.noLongerInheritsFromClass
  • Code:
    ## Old:
    class org.xwiki.rendering.wikimodel.xhtml.impl.LocalEntityResolver
    
    ## New:
    class org.xwiki.rendering.wikimodel.xhtml.impl.LocalEntityResolver
• Source breakage but not a backward compatible one. We consider it's acceptable
  • Violation type:
    java.class.nonFinalClassInheritsFromNewClass
  • Code:
    ## Old:
    class org.xwiki.rendering.wikimodel.xhtml.impl.LocalEntityResolver
    
    ## New:
    class org.xwiki.rendering.wikimodel.xhtml.impl.LocalEntityResolver
• Young API and still not really used externally
  • Violation type:
    java.field.removed
  • Code:
    ## Old:
    field org.xwiki.store.merge.MergeDocumentResult.DocumentPart.LOCALE

Credits

The following people have contributed code and translations to this release (sorted alphabetically):

• Carlos Amengual
• Guillaume Delhumeau
• Manuel Leduc
• Marius Dumitru Florea
• Simon Urli
• Thomas Mortagne
• Vincent Massol