[jira] [Commented] (SOLR-11920) Differential file copy for IndexFetcher

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[jira] [Commented] (SOLR-11920) Differential file copy for IndexFetcher

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-11920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440436#comment-16440436 ]

Shalin Shekhar Mangar commented on SOLR-11920:
----------------------------------------------

bq. I've pushed a fix for these failures (they were genuine code issues, not just test issues).

What exactly were the issues and how might they manifest in production? Since this went out in 7.3, can you ensure it is back-ported to branch_7_3 so that the fix makes it to the proposed 7.3.1?

> Differential file copy for IndexFetcher
> ---------------------------------------
>
>                 Key: SOLR-11920
>                 URL: https://issues.apache.org/jira/browse/SOLR-11920
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public)
>            Reporter: Ishan Chattopadhyaya
>            Assignee: Ishan Chattopadhyaya
>            Priority: Major
>         Attachments: SOLR-11920.patch, SOLR-11920.patch, thetaphi.Lucene.Solr.7.x.Linux.1675.log.txt.gz
>
>
> In the case of fullCopy=true, all files are copied over from the leader/master irrespective of whether or not that exact file exists with the replica/slave. This is wasteful, esp. in tlog replicas or pull replicas, when only a fraction of the total files are different.
> This stems from SOLR-11815.



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