[jira] [Updated] (LUCENE-6213) Add test for IndexFormatTooOldException if a commit has a 3.x segment

["Ryan Ernst (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6213?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ryan Ernst updated LUCENE-6213:
-------------------------------
    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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