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https://issues.apache.org/jira/browse/SOLR-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14277707#comment-14277707
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Mark Miller commented on SOLR-6920:
-----------------------------------

But isnt this just checking what solrconfig is set to? And that doesn't have to 
match what the index was built with?

> During replication use checksums to verify if files are the same
> ----------------------------------------------------------------
>
>                 Key: SOLR-6920
>                 URL: https://issues.apache.org/jira/browse/SOLR-6920
>             Project: Solr
>          Issue Type: Bug
>          Components: replication (java)
>            Reporter: Varun Thacker
>         Attachments: SOLR-6920.patch, SOLR-6920.patch
>
>
> Currently we check if an index file on the master and slave is the same by 
> checking if it's name and file length match. 
> With LUCENE-2446 we now have a checksums for each index file in the segment. 
> We should leverage this to verify if two files are the same.
> Places like SnapPuller.isIndexStale and SnapPuller.downloadIndexFiles should 
> check against the checksum also.



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