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https://issues.apache.org/jira/browse/SOLR-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13502612#comment-13502612
 ] 

Po Rui commented on SOLR-4105:
------------------------------

It cause the load balance for search. it means your search requests may not 
handle by instance A even you send them to A. more detail:
1 slice with 2 shards refer to A(leader) and B(replica).when you send a search 
request to A it assign to A or B randomly by A.
so the situation in 
http://lucene.472066.n3.nabble.com/Weird-Behaviour-on-Solr-5x-SolrCloud-td4021219.html
 is normal. 
The problem is the restarted B doesn't recovery to the leader A. it may be a 
bug or cause a uncompleted feature due to the recovering base on file level and 
commit version 
                
> SolrCloud - Restarting a Solr Node Causes Random Results 
> ---------------------------------------------------------
>
>                 Key: SOLR-4105
>                 URL: https://issues.apache.org/jira/browse/SOLR-4105
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 5.0
>         Environment: Linux
>            Reporter: Deniz Durmus
>              Labels: solrcloud, solrindex
>
> For Brief description, basically restarting a Solr instance in cloud causes a 
> weird behavior, it shows results, randomly from the instance itself and then 
> the leader, which causes seeing 0 results and then correct amount of results.
> In addition to this, the restarted node wont be sync'ed with the rest of the 
> cloud, unless you delete the data folder's contents before restarting.
> For more details, you can follow the thread here:
> You can see the details and flow of the issue here: 
> http://lucene.472066.n3.nabble.com/Weird-Behaviour-on-Solr-5x-SolrCloud-td4021219.html
>  

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