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https://issues.apache.org/jira/browse/LUCENE-5863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14128763#comment-14128763
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Michael McCandless commented on LUCENE-5863:
--------------------------------------------

I think adding this to smoke tester is ok?  Smoke tester is run by jenkins 
periodically so if a release somehow gets out w/o TestBackCompat being updated, 
we'll know before the next release.

I like that the check is "end to end" (does not know about / make assumptions 
about implementation details like version constants).  It's also not that 
heavy: loads the URL from apache.org, runs 2 BWC tests, and then checks that 
the versions it saw are the same ...

I agree it's somewhat redundant with the one-time version check plus ongoing 
check for each release, but I think having some redundancy here is actually 
really important (who tests the test testers!).

But separately I agree we should also have tests to confirm there is a version 
constant for every still-supported release.


> Generate backwards compatibility indexes for all 4.x releases
> -------------------------------------------------------------
>
>                 Key: LUCENE-5863
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5863
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
>         Attachments: testTheBWCTester.py
>
>
> Currently the versioning here is a total mess, and its inconsistent across 
> bugfix releases.
> We should just generate back compat indexes for every release: regardless of 
> whether the index format changed, even for bugfix releases. This ensures at 
> least we try to test that the back compat is working.



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