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From "Jens Bo Rasmussen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-3417) Data is not replicated when empty replica slices become leader slices
Date Thu, 26 Apr 2012 11:37:17 GMT
Jens Bo Rasmussen created SOLR-3417:
---------------------------------------

             Summary: 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
         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
             Fix For: 4.1


Scenario: ensure that data is replicated when empty replica slices become leader slices
Given a SolrCloud cluster is running with
# of servers (Solr nodes): 2
# of slices per node: 1
# of replica per slice: 0
# of documents in leader slice on first Solr node: 4
# 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
# of servers (Solr nodes): 2
# of slices per node: 1
# of replica per slice: 1
# of documents in leader slice on first Solr node: 4
# of documents in replica slice on second Solr node: 4
# of documents in leader slice on first Solr node: 1
# of documents in replica slice on second Solr node: 1

Testresult: data is not replicated
# of servers (Solr nodes): 2
# of slices per node: 1
# of replica per slice: 1
# of documents in leader slice on first Solr node: 4
# of documents in replica slice on second Solr node: 0
# of documents in leader slice on first Solr node: 0
# of documents in replica slice on second Solr node: 1

When the first Solr node is started the added replica slices are declared leaders (with 0
documents obviously)
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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