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https://issues.apache.org/jira/browse/SOLR-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14276158#comment-14276158
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Varun Thacker commented on SOLR-6920:
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Hi [[email protected]],
Thanks for the review!
bq. We should not need the back compat < 5.0 code AFAICT though.
>From what I understand an index built pre LUCENE-2446 would not have the
>checksum , so {{CodecUtil.retrieveChecksum(in)}} would throw an error as the
>validation would fail. I guess the check should be 4_8 and not 5_0 though.
> 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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