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https://issues.apache.org/jira/browse/SOLR-11216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16530699#comment-16530699
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ASF subversion and git services commented on SOLR-11216:
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Commit 32ccf6132614677b6bcef2f159a05d211284f3b1 in lucene-solr's branch
refs/heads/branch_7x from [~caomanhdat]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=32ccf61 ]
SOLR-11216: Fix test failures, since the new PeerSyncWithLeader won't open a
realtime searcher everytime
> Race condition in peerSync
> --------------------------
>
> Key: SOLR-11216
> URL: https://issues.apache.org/jira/browse/SOLR-11216
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 7.4
> Reporter: Cao Manh Dat
> Assignee: Cao Manh Dat
> Priority: Major
> Fix For: master (8.0), 7.5
>
> Attachments: SOLR-11216.patch, SOLR-11216.patch, SOLR-11216.patch,
> SOLR-11216.patch, SOLR-11216.patch, SOLR-11216.patch, SOLR-11216.patch
>
>
> When digging into SOLR-10126. I found a case that can make peerSync fail.
> * leader and replica receive update from 1 to 4
> * replica stop
> * replica miss updates 5, 6
> * replica start recovery
> ## replica buffer updates 7, 8
> ## replica request versions from leader,
> ## in the same time leader receive update 9, so it will return updates from 1
> to 9 (for request versions) when replica get recent versions ( so it will be
> 1,2,3,4,5,6,7,8,9 )
> ## replica do peersync and request updates 5, 6, 9 from leader
> ## replica apply updates 5, 6, 9. Its index does not have update 7, 8 and
> maxVersionSpecified for fingerprint is 9, therefore compare fingerprint will
> fail
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