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https://issues.apache.org/jira/browse/SOLR-6920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309538#comment-14309538
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Mark Miller commented on SOLR-6920:
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bq. In your patch if the file fails to retrieve a checksum...
Feel free to put up a follow on patch - this one is just a first draft. I'll be
taking another pass when I get a chance as well.
bq. I think you have an extra file from HdfsTestUtil in the patch.
No, that's fixes an error I see in the test that shalin mentions in SOLR-6640
and led me back to this issue.
> 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
> Assignee: Mark Miller
> Priority: Critical
> Attachments: SOLR-6920.patch, 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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