[jira] [Comment Edited] (LUCENE-5940) change index backwards compatibility policy.

["Adrien Grand (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130104#comment-14130104 ] 

Adrien Grand edited comment on LUCENE-5940 at 9/11/14 2:51 PM:
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bq. My concrete proposal is supporting the current major release, plus the last minor release of the previous major release.

That is what I was thinking about as well when reading the issue description. Having to keep bw compat for all 4.x codecs once 5.0 is released would be a nightmare.


was (Author: jpountz):
bq. My concrete proposal is supporting the current major release, plus the last minor release of the previous major release.

That is what I was thinking about as well when reading the issue description.

> change index backwards compatibility policy.
> --------------------------------------------
>
>                 Key: LUCENE-5940
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5940
>             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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