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https://issues.apache.org/jira/browse/LUCENE-8437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-8437.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 7.5
                   master (8.0)

> CheckIndex should not duplicate SegmentInfos serialization
> ----------------------------------------------------------
>
>                 Key: LUCENE-8437
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8437
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Adrien Grand
>            Priority: Major
>             Fix For: master (8.0), 7.5
>
>         Attachments: LUCENE-8437.patch
>
>
> CheckIndex tries to read the segments file to provide more information about 
> the problem, but it gets almost everything wrong: it reads an int which based 
> on comments and error messages is either the format or the version but this 
> is actually the magic number of the codec header. It looks like this code is 
> about10 years old and hasn't been updated when we added checksums to index 
> files. SegmentInfos does a better job at detecting issues nowadays, so these 
> manual checks can be removed.



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