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https://issues.apache.org/jira/browse/SOLR-3417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582220#comment-15582220
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Alexandre Rafalovitch commented on SOLR-3417:
---------------------------------------------

Another (similar to SOLR-3420) ancient bug report that was never reviewed or 
confirmed. A bit late to worry about this one now?

> Data is not replicated when empty replica slices become leader slices
> ---------------------------------------------------------------------
>
>                 Key: SOLR-3417
>                 URL: https://issues.apache.org/jira/browse/SOLR-3417
>             Project: Solr
>          Issue Type: Bug
>          Components: replication (java)
>    Affects Versions: 4.0-ALPHA
>         Environment: Linux 2.6.32-29-server #58-Ubuntu SMP Fri Feb 11 
> 21:06:51 UTC 2011 x86_64 GNU/Linux, Solr snapshot from 29th of February 2012, 
> 2 Solr machines with 1 slice each and 0 replica
>            Reporter: Jens Bo Rasmussen
>            Priority: Minor
>              Labels: replica
>             Fix For: 4.9, 6.0
>
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> Scenario: ensure that data is replicated when empty replica slices become 
> leader slices
> Given a SolrCloud cluster is running with
> number of servers (Solr nodes): 2
> number of slices per node: 1
> number of replica per slice: 0
> number of documents in leader slice on first Solr node: 4
> number of documents in leader slice on second Solr node: 1
> When I configure each node with 1 replica per slice
> And I stop all nodes
> And I start the nodes one at a time
> Then I would expect that the SolrCloud cluster is running with
> number of servers (Solr nodes): 2
> number of slices per node: 1
> number of replica per slice: 1
> number of documents in leader slice on first Solr node: 4
> number of documents in replica slice on second Solr node: 4
> number of documents in leader slice on first Solr node: 1
> number of documents in replica slice on second Solr node: 1
> Testresult: data is not replicated
> number of servers (Solr nodes): 2
> number of slices per node: 1
> number of replica per slice: 1
> number of documents in leader slice on first Solr node: 4
> number of documents in replica slice on second Solr node: 0
> number of documents in leader slice on first Solr node: 0
> number of documents in replica slice on second Solr node: 1
> When the first Solr node is started the added replica slices are declared 
> leaders
> When the second Solr node is started the slices which were previously leaders 
> are declared replica
> And the data is not replicated from the leader slices to the replica slices 
> or vice versa
> ==> data is not replicated



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