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https://issues.apache.org/jira/browse/PHOENIX-5607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17007002#comment-17007002
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Lars Hofhansl commented on PHOENIX-5607:
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In my last comment... What I want to point out is that we can do complete
upgrade like this in a fairly simple way.
What's missing is gold file support (or some other way to automatically check
the output of exceptions).
> Client-server backward compatibility tests
> -------------------------------------------
>
> Key: PHOENIX-5607
> URL: https://issues.apache.org/jira/browse/PHOENIX-5607
> Project: Phoenix
> Issue Type: Test
> Affects Versions: 4.15.0
> Reporter: Lars Hofhansl
> Priority: Blocker
> Labels: phoenix-hardening
> Fix For: 4.16.0
>
>
> Filing this as a blocker for 4.16.0.
> As we've seen with the various failed attempts to release 4.15.0 Phoenix'
> backwards compatibility story is weak, and lacks tests - in fact there're no
> tests.
> We should not allow to ship 4.16.0 without improving that and without tests.
> [~ckulkarni], [~gjacoby] , FYI, what we discussed.
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