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https://issues.apache.org/jira/browse/SOLR-4997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699269#comment-13699269
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Shalin Shekhar Mangar commented on SOLR-4997:
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bq. You won't lose any updates... this is more about update visibility.

Yes, exactly. A side effect of this bug is that the newly created sub shards 
are inconsistent in terms of update visibility. The leader of the sub shard 
will not have new updates visible (depending on auto commit settings) but all 
other replicas will have new updates visible because they are created after the 
split.
                
> The splitshard api doesn't call commit on new sub shards
> --------------------------------------------------------
>
>                 Key: SOLR-4997
>                 URL: https://issues.apache.org/jira/browse/SOLR-4997
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 4.3, 4.3.1
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>             Fix For: 4.4
>
>
> The splitshard api doesn't call commit on new sub shards but it happily sets 
> them to active state which means on a successful split, the documents are not 
> visible to searchers unless an explicit commit is called on the cluster.
> The coreadmin split api will still not call commit on targetCores. That is by 
> design and we're not going to change that.

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