[SOLR-3418] Sometimes data is not replicated to replica slices which are added to a SolrCloud cluster which runs without replica

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Cannot Reproduce
• Affects Version/s: 4.0-ALPHA
• Fix Version/s: 4.9, 6.0
• Component/s: replication (java)
• Labels: replica

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

• Assignee: Unassigned
• Reporter: Jens Bo Rasmussen
• Created: 27/Apr/12 11:56
• Updated: 02/Oct/16 07:03
• Resolved: 02/Oct/16 07:03

Description

Scenario: ensure that replica slices specified in the configuration are added on sequential node restart without loosing data
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 restart 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: the scenario has been performed several times with success however sometimes data is not replicated; it has been observed that sometimes no data is replicated at all and sometimes only data from one of the slices is replicated