[news.eclipse.simultaneous-release] Re: error updating Ganymede to Galil

[John Arthorne <eclipseng@xxxxxxxxxxxx>]

The Galileo repository is using a completely new kind of repository 
called a "composite repository". Since Eclipse 3.4 doesn't know anything 
about this repository type, it can't find any artifacts (hence the "No 
repository found..." errors). The metadata is otherwise completely 
compatible between 3.4 and 3.5, so upgrades across releases are 
theoretically possible. But, if your metadata takes advantage of new 
concepts added in 3.5 (such as composite repositories), then previous 
releases won't be able to process it.

Enabling major release upgrades while still allowing new releases to 
make use of new features really requires a "staged" upgrade: upgrade p2 
first, then use the new p2 to upgrade the rest. Some support for this 
was added in 3.5, which should increase the number of cases where we can 
support major-release upgrades in the future. Supporting upgrades across 
major releases is on the draft plan for 3.6, but we've learned enough 
about how complicated this really is that we won't be making any 
promises until we're sure it will work ;)

--

Eric Rizzo wrote:
> David Williams wrote:
> > BUT, upgrading from Ganymede to Galileo is not supported. You should 
> > start off with one of the main packages found at 
> > http://www.eclipse.org/downloads/ and then install other items into 
> > that install.
>
> David,
> Are you certain that Ganymede -> Galileo updates are really not 
> supported. One of the benefits of p2 was supposed to be the ability to 
> (finally) update across major releases.
>
> Eric