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https://issues.apache.org/jira/browse/LUCENE-6213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ryan Ernst updated LUCENE-6213:
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Attachment: LUCENE-6213.patch
I tried the codec idea, but it unfortunately required changing a lot of callers
to handling IOException or themselves throw IOException, and the change got
very large.
Here is a new patch (still against branch_5x) that incorporates an additional
check to give a nice error message if the user should probably include
backward-codecs.jar. It also is setup to easily forward port to trunk (just
adding to the list of unsupportedCodecs).
> Add test for IndexFormatTooOldException if a commit has a 3.x segment
> ---------------------------------------------------------------------
>
> Key: LUCENE-6213
> URL: https://issues.apache.org/jira/browse/LUCENE-6213
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: LUCENE-6213.patch, LUCENE-6213.patch,
> unsupported.4x-with-3x-segments.zip
>
>
> We should add a 4.x index (4.x commit) with some 3.x segment(s) to our
> backwards tests.
> I don't think we throw IndexFormatTooOldException correctly in this case. I
> think instead the user will get a confusing SPI error about a missing codec
> "Lucene3x".
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