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https://issues.apache.org/jira/browse/SOLR-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309353#comment-14309353
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Mark Miller commented on SOLR-6920:
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bq. Any idea on how to tackle it
It seems like we can't be sure every file will have a checksum (at least in
tests) and we have to recover properly if we find that it doesn't?
> 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
> Priority: Critical
> Attachments: SOLR-6920.patch, 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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