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https://issues.apache.org/jira/browse/HBASE-21229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16629232#comment-16629232
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Lars Hofhansl commented on HBASE-21229:
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It would actually quite helpful (but a *lot* of work) to codify the semantic
versioning guarantees we agreed to (see here:
https://hbase.apache.org/book.html#hbase.versioning.
Once we have coded these tests, we'd include a client jar from from 1 minor
version back, from 1 patch version back, and from 1 major version back.
... As I said a lot of work...
> Add a nightly check that client-server wire compatibility works
> ---------------------------------------------------------------
>
> Key: HBASE-21229
> URL: https://issues.apache.org/jira/browse/HBASE-21229
> Project: HBase
> Issue Type: Improvement
> Components: test
> Affects Versions: 3.0.0, 1.5.0, 1.3.3, 1.2.8, 2.2.0, 1.4.8, 2.1.1, 2.0.3
> Reporter: Sean Busbey
> Priority: Major
>
> From HBASE-20993:
> {quote}
> bq. Good reminder that we lack a unit test for wire compatibility. I wonder
> how hard it would be to grab the 1.2 shaded client artifact and use it to
> talk with the server code at head of branch.
> We could add a nightly test that did this pretty easily. Essentially we could
> just add it as an additional step in [the test that starts up a 1-node
> cluster and runs an example
> program|https://github.com/apache/hbase/blob/master/dev-support/hbase_nightly_pseudo-distributed-test.sh].
> {quote}
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