On Aug 28, 2009, at 10:35 AM, Doug Cutting wrote:
Sanjay Radia wrote:
> I propose that we honor the compatibility of stable interfaces from
> release 0.21 onwards;
> i.e. apply the same post 1.0 rules to pre-1.0 releases.
I think that makes 0.21 effectively 1.0. The hallmark of 1.0 will be
our promise not to change APIs incompatibly until 2.0. If we make
that
promise sooner, then we're just accelerating 1.0.
Not quite. 1.0 includes wire compatibility. We can't call it 1.0
without wire compatibility.
I understood that the plan was to add inter-release wire compatibility
after 1.0, somewhere in the 1.x series of releases.
No. The 1.0 proposal was that it included both API and wire
compatibility.
See HADOOP-5071.
So, e.g., if we add
it in 1.1, then a 1.1 and 1.2 cluster would be able to make RPCs to
one
another, but 1.0 would not be able to make RPCs to these releases or
vice versa.
Doug
