[wildfly-dev] Dropping legacy XSD schemas & its parsers

Hi folks, we discussed on team meeting in Brno about dropping support for old legacy host controllers when running in mixed domain mode (having DC of newer version managing older version HCs) We also discussed dropping old xsd sachems & parsers as it would help us cleanup and simplify code in many subsystems as there are cases where we support and maintain 5 and more different versions of parser. For example currently web subsystem has 8, infinispan 7, ejb & jackorb have 6, ... We still have parsers that that ware shipped back in 7.0.0 and became obsolete in later 7.0.x releases. Given that we decided that we are dropping support for running mixed domain mode for host controller that are older than 7.3.0 (EAP 6.2) as is tracked by https://issues.jboss.org/browse/WFLY-3564 I would also like to suggest that we do the same for xml schemas & parsers. *What is the downside?* Automatic upgrading from JBoss AS 7.1.x/EAP < 6.2 version with using same standalone.xml won't work anymore. User would need to upgrade to WildFly 8.x and from there to 9 or 10 (depending when we drop this) Because of replacement of web subsystem with undertow and introduction of few other subsystems (io, SM) this already doesn't work for 7.x-->8+, but we do have plans how to improve that. So, are there any objections against this? -- Tomaž