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From Dan Halperin <>
Subject Re: [VOTE] Apache Beam release 0.3.0-incubating
Date Sat, 29 Oct 2016 06:07:24 GMT
Hi Justin,

Thanks for excellent detailed analysis, as usual!

1) Hmm! I do see a file called `DEPENDENCIES` in the source release [0],
but it is not checked in [1]. It must be introduced somehow by `mvn
release-plugin`, following our release process [2].
   To clear up some possible confusion: We **definitely** run Apache RAT in
the release profile [3], which is ran continually on every single commit
[4], and this has indeed caught unlicensed files. [5] Because DEPENDENCIES
is not under version control but somehow ended up in the source release,
RAT does not help here.
   We'll have to find where in the release process this file was
introduced. This same issue happened in the two prior incubating releases,
but was not noticed :/.

(HTTP 404 expected)
[4] Example:$beam-parent/console


2) I'm not sure precisely what the definition of `optional` is; I'd like
some clarification. We do indeed build the module by default, but it is not
in any way required to use Beam. For example:
   Beam's examples [6] module does not depend on Kinesis. This is a key
user starting point -- the examples provide many useful, flagship
end-to-end Beam pipelines. The same goes for our Maven archetypes for the
examples [7] and starter projects [8]. In fact, no module depends on the
module that provides Kinesis, explicitly so that it is completely unused
unless a user opts into it.



On Fri, Oct 28, 2016 at 10:37 PM, Justin Mclean <>

> Hi,
> > We discussed about this dependency on the dev mailing list.
> Yep I read that discussion and it seems to me to be missing the main
> point. Yes you can’t have Category X software in a release but you can’t
> have it as a dependancy either unless it’s optional.
> > The dependency is not embedded in any Beam distribution or jar file. The
> users have to explicitly define the dependency to be able to use the
> Kinesis IO.
> Which may not be enough IMO. The question to ask is “Will most users want
> to use Kinesis IO or not?"
> Thanks,
> Justin
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