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https://issues.apache.org/jira/browse/LUCENE-7756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15952827#comment-15952827
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Michael McCandless commented on LUCENE-7756:
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bq. However for testing old codecs, we create new indices (createdVersion = 7)
with old codec components that do not support recording the minVersion, such as
Lucene62RWSegmentInfoFormat
Ahh, OK, and that is because our "fake creating of old indices" isn't perfect
(sets createdVersion = 7). OK, this makes sense, and is hard to think about.
Thanks.
> Only record the major that was used to create the index rather than the full
> version
> ------------------------------------------------------------------------------------
>
> Key: LUCENE-7756
> URL: https://issues.apache.org/jira/browse/LUCENE-7756
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-7756.patch, LUCENE-7756.patch
>
>
> LUCENE-7703 added information about the Lucene version that was used to
> create the index to the segment infos. But since there is a single creation
> version, it means we need to reject calls to addIndexes that can mix indices
> that have different creation versions, which might be seen as an important
> regression by some users. So I have been thinking about only recording the
> major version that was used to create the index, which is still very valuable
> information and would allow us to accept calls to addIndexes when all merged
> indices have the same major version. This looks like a better trade-off to me.
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