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https://issues.apache.org/jira/browse/SPARK-2709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell reopened SPARK-2709:
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This came up in some recent conversations. I actually don't think we ever
merged this into Spark, so re-opening the issue.
> Add a tool for certifying Spark API compatiblity
> ------------------------------------------------
>
> Key: SPARK-2709
> URL: https://issues.apache.org/jira/browse/SPARK-2709
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Reporter: Patrick Wendell
> Assignee: Prashant Sharma
>
> As Spark is packaged by more and more distributors, it would be good to have
> a tool that verifies API compatiblity of a provided Spark package. The tool
> would certify that a vendor distrubtion of Spark contains all of the API's
> present in a particular upstream Spark version.
> This will help vendors make sure they remain "API compliant" when they make
> changes or back ports to Spark. It will also discourage vendors from
> knowingly breaking API's, because anyone can audit their distribution and see
> that they have removed support for certain API's.
> I'm hoping a tool like this will avoid API fragmentation in the Spark
> community.
> One "poor man's" implementation of this is that a vendor can just run the
> binary compatibility checks in the spark build against an upstream version of
> Spark. That's a pretty good start, but it means you can't come as a third
> party and audit a distribution.
> Another approach would be to have something where anyone can come in and
> audit a distribution even if they don't have access to the packaging and
> source code. That would look something like this:
> 1. For each release we publish a manifest of all public API's (we might
> borrow the MIMA string representation of bye code signatures)
> 2. We package an auditing tool as a jar file.
> 3. The user runs a tool with spark-submit that reflectively walks through all
> exposed Spark API's and makes sure that everything on the manifest is
> encountered.
> From the implementation side, this is just brainstorming at this point.
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