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From Keith Turner <ke...@deenlo.com>
Subject Re: Deprecation removal for 1.7.0
Date Wed, 08 Oct 2014 20:53:38 GMT
On Wed, Oct 8, 2014 at 4:48 PM, Mike Drob <madrob@cloudera.com> wrote:

> Applications that worked with Accumulo 1.4 may or may not work with 1.6
> already (we've made a lot of changes to the InputFormat, for example) so
> trying to promise compatibility with 2.0 sounds like a very losing battle.
>


Fair point.  The 1.6.0 release notes[1] outline deprecated methods that
were dropped  in the "API Changes" section ( and I think I wrote some of
that).

[1]: http://accumulo.apache.org/release_notes/1.6.0.html


>
> On Wed, Oct 8, 2014 at 3:44 PM, Keith Turner <keith@deenlo.com> wrote:
>
> > On Tue, Oct 7, 2014 at 3:03 PM, Bill Havanki <bhavanki@clouderagovt.com>
> > wrote:
> >
> > > I took a look at Christopher's commits for ACCUMULO-3197 and they all
> > look
> > > fine to me. Any other reviewers may like to add "?w=1" to the URL for
> > each
> > > commit to ignore whitespace-only changes in the view, e.g.:
> > >
> > >
> > >
> >
> https://github.com/ctubbsii/accumulo/commit/dc1332b5fb5f358f3fff432a1a0fef4f56c1628e
> > > *?w=1*
> > >
> > > Going forward, it'd be nice to have a rule of thumb for how long a
> > > deprecated item will linger: some possibilities:
> > >
> > > - 2 minor releases or the next major release, whichever comes first
> > > - always until the next major release (this may make sense starting
> with
> > > 2.0.0)
> > >
> > > I like the idea of a tool to find use of deprecated calls; it appears
> > that
> > > Eclipse and Sonar can do that:
> > >
> > >
> > >
> >
> http://stackoverflow.com/questions/14490021/scanning-code-base-for-use-of-deprecated-methods
> > >
> > > Overall, +1 to removing deprecations from 1.4 and earlier.
> > >
> >
> > So this in effect making the statement that Accumulo apps that worked w/
> > 1.4 may not work w/ 2.0.0.  Is that what we want?  If this would cause
> > someone to not Adopt 2.0.0, is that what we would want?  Do we want to be
> > able to say that if your app worked w/ 1.4, it will work with 2.0.0?  If
> > so, 2.0.0 does not have to exist forever.  Eventually we can release
> 3.0.0
> > and break 1.4 apps.
> >
> >
> >
> > >
> > > Bill
> > >
> > >
> > > On Mon, Oct 6, 2014 at 11:18 PM, Christopher <ctubbsii@apache.org>
> > wrote:
> > >
> > > > On Mon, Oct 6, 2014 at 9:45 PM, Adam Fuchs <afuchs@apache.org>
> wrote:
> > > >
> > > > > So, I think we can make a general argument to set policy, and when
> > > > removing
> > > > > a specific method we should make a specific argument. Personally,
I
> > > would
> > > > > set the bar at identifying the specific harm cause by the retention
> > of
> > > > the
> > > > > method, as well as polling the community and considering
> objections.
> > > > >
> > > > > Christopher, you made an argument about people misunderstanding the
> > > > > semantics of the method and using it incorrectly. Is that not
> solved
> > by
> > > > > just deprecating the method?
> > > > >
> > > > >
> > > > Clearly no, since mistakes are still occurring in 1.7.0-SNAPSHOT and
> it
> > > was
> > > > deprecated in 1.6.0. Further, it was hard to notice because:
> > > >
> > > > 1) it's the only way to currently get that information from the API
> to
> > > the
> > > > RPC layer (see ACCUMULO-3199)
> > > > (In my proposed commit[1], I offer a temporary workaround which
> > involves
> > > > better naming, and limits the API to the ZooKeeperInstance only)
> > > > 2) the use of the method occurred in a somewhat badly named utility
> > > method
> > > > which suppressed deprecation warnings
> > > >
> > > > Until ACCUMULO-3199 is fixed to address the shortcoming of being able
> > to
> > > > get the user-provided client RPC config to the RPC layer, this method
> > is
> > > > going to be prone to abuse.
> > > >
> > > > [1] https://github.com/ctubbsii/accumulo/commit/52806b6?diff=split
> > > >
> > > > --
> > > > Christopher L Tubbs II
> > > > http://gravatar.com/ctubbsii
> > > >
> > >
> > >
> > >
> > > --
> > > // Bill Havanki
> > > // Solutions Architect, Cloudera Govt Solutions
> > > // 443.686.9283
> > >
> >
>

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