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https://issues.apache.org/jira/browse/SOLR-5324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791463#comment-13791463
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Anshum Gupta commented on SOLR-5324:
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This is good. Just had a quick look and it looks fine to me.
> Make sub shard replica recovery and shard state switch asynchronous
> -------------------------------------------------------------------
>
> Key: SOLR-5324
> URL: https://issues.apache.org/jira/browse/SOLR-5324
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: Shalin Shekhar Mangar
> Assignee: Shalin Shekhar Mangar
> Fix For: 4.6, 5.0
>
> Attachments: SOLR-5324.patch, SOLR-5324.patch
>
>
> Currently the shard split command waits for all replicas of all sub shards to
> recover and then switches the state of parent to inactive and sub-shards to
> active.
> The problem is that shard split (ab)uses the CoreAdmin WaitForState action to
> ask the sub shard leader to wait until the replica states are active. This
> action is prone to timeout.
> We should make the shard state switching asynchronous. Once all replicas of
> all sub-shards are 'active', the shard states should be switched
> automatically.
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