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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-5940) change index backwards compatibility policy.
Date Thu, 11 Sep 2014 15:29:34 GMT


Robert Muir commented on LUCENE-5940:

however, 5.0 should ideally continue to support 4.0-4.99 indexes (at least from the codec/index
reading perspective)

Who will do the work? Who will maintain this? 

Won't be me.

> change index backwards compatibility policy.
> --------------------------------------------
>                 Key: LUCENE-5940
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Robert Muir
> Currently, our index backwards compatibility is unmanageable. The length of time in which
we must support old indexes is simply too long.
> The index back compat works like this: everyone wants it, but there are frequently bugs,
and when push comes to shove, its not a very sexy thing to work on/fix, so its hard to get
any help.
> Currently our back compat "promise" is just a broken promise, because we cannot actually
guarantee it for these reasons.
> I propose we scale back the length of time for which we must support old indexes.

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