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https://issues.apache.org/jira/browse/SOLR-11069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16129772#comment-16129772
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ASF subversion and git services commented on SOLR-11069:
--------------------------------------------------------

Commit c7f9fcea4b4455c921987e4447b68cdbe046e2f6 in lucene-solr's branch 
refs/heads/branch_6_6 from [~erickerickson]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=c7f9fce ]

SOLR-11069: CDCR bootstrapping can get into an infinite loop when a core is 
reloaded

(cherry picked from commit ac97931c7e5800b2e314545f54c4d524eb69b73b)


> CDCR bootstrapping can get into an infinite loop when a core is reloaded
> ------------------------------------------------------------------------
>
>                 Key: SOLR-11069
>                 URL: https://issues.apache.org/jira/browse/SOLR-11069
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: CDCR
>    Affects Versions: 6.2, 6.3, 6.4, 6.5, 6.6, 7.0
>            Reporter: Amrit Sarkar
>            Assignee: Erick Erickson
>             Fix For: 7.0, 6.7, 6.6.1, master (8.0), 7.1
>
>         Attachments: SOLR-11069.patch, SOLR-11069.patch, SOLR-11069.patch
>
>
> {{LASTPROCESSEDVERSION}} (a.b.v. LPV) action for CDCR breaks down due to 
> poorly initialised and maintained buffer log for either source or target 
> cluster core nodes.
> If buffer is enabled for cores of either source or target cluster, it return 
> {{-1}}, *irrespective of number of entries in tlog read by the {{leader}}* 
> node of each shard of respective collection of respective cluster. Once 
> disabled, it starts telling us the correct LPV for each core.
> Due to the same flawed behavior, Update Log Synchroniser may doesn't work 
> properly as expected, i.e. provides incorrect seek to the {{non-leader}} 
> nodes to advance at. I am not sure whether this is an intended behavior for 
> sync but it surely doesn't feel right.



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