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From Sean Busbey <bus...@cloudera.com>
Subject Re: Setting JIRA fix versions for 3.0.0 releases
Date Tue, 26 Jul 2016 12:54:14 GMT
Yes, the Java API Compliance Checker allows specifying Annotations to
pare down where incompatible changes happen. It was added some time
ago based on feedback from the Apache HBase project.

The limitations I've found are: 1) at least earlier versions only
supported annotations at the class level (which prevents things like
VisibleForTesting), 2) sometimes it will include more restricted
classes if they are used in less restrictive APIs (e.g. if a IA.Public
class makes use of a IA.Private class in a method signature).

At least when we've used it in HBase, these limitations have been very
easy to spot an explain in a small amount of text. I expect I will be
able to do the same with Hadoop. If we'd like to automate this, the
author has been very responsive to feature requests thus far.

On Mon, Jul 25, 2016 at 3:47 PM, Vinod Kumar Vavilapalli
<vinodkv@apache.org> wrote:
> Actually, I wouldn’t trust this report as it stands today at all.
> I quickly glanced the report, looking for what it highlights as
> incompatible. But the ones that I saw have private / visible for testing
> annotations. Other than acting as useless evidence for those lashing out on
> branch-2, this won’t do much good.
> Whenever we start working towards switching to this tool, it should
> incorporate the same exclude-annotations logic that the jdiff code-path does
> today. Do you think that is possible?
> Thanks
> +Vinod
> On Jul 22, 2016, at 4:53 PM, Vinod Kumar Vavilapalli <vinodkv@apache.org>
> wrote:
> Do you want this check from some particular branch-2 release? It
> matters since the releases along branch-2 have themselves had some
> noise[2].
> [1]: https://github.com/lvc/japi-compliance-checker
> <https://github.com/lvc/japi-compliance-checker>
> [2]: http://abi-laboratory.pro/java/tracker/timeline/hadoop/
> <http://abi-laboratory.pro/java/tracker/timeline/hadoop/>
> --
> busbey


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