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

[Tomaž Cerar]

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
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