Thank you, Reynold. Clear enough as a backporting and as a new release criteria.
Yes. Definitely. If there is no new commit on `branch-1.6`, there is no need to 
release.

However, Apache Spark 1.6.3 was a single release *accumulating* those kind of 
52 patches.
Given that `branch-1.5` has over 100 patches and we don't expect `1.5.3`, 
`branch-1.6` looks to me extraordinary as the last emperor of Apache Spark 1.X.

Bests,
Dongjoon.

On 2016-11-27 12:50 (-0800), Reynold Xin <r...@databricks.com> wrote: 
> I think this highly depends on what issues are found, e.g. critical bugs
> that impact wide use cases, or security bugs.
> 
> 
> On Sun, Nov 27, 2016 at 12:49 PM, Dongjoon Hyun <dongj...@apache.org> wrote:
> 
> > Hi, All.
> >
> > Do we have a release plan of Apache Spark 1.6.4?
> >
> > Up to my knowledge, Apache Spark community has been focusing on latest two
> > versions.
> > There was no official release of Apache Spark *X.X.4* so far. It's also
> > well-documented on Apache Spark home page (Versioning policy;
> > http://spark.apache.org/versioning-policy.html)
> >
> > > A minor release usually sees 1-2 maintenance releases in the 6 months
> > following its first release.
> >
> > So, personally, I don't expect Apache Spark 1.6.4. After Apache Spark 2.1
> > will be released very soon, 2.1 and 2.0 will be the two major versions
> > which the most community effort is going to focus on.
> >
> > However, *literally*, two major versions of Apache Spark will be Apache
> > Spark 1.X (1.6.3) and Apache Spark 2.X. Since there is API compatibility
> > issues between major versions, I guess 1.6.X will survive for a while like
> > JDK7.
> >
> > If possible, could we have a clear statement whether there is a plan for
> > 1.6.4 on homepage?
> >
> > Bests,
> > Dongjoon.
> >
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> >
> >
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