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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (SOLR-10285) Skip LEADER messages when there are leader only shards
Date Wed, 04 Oct 2017 02:03:01 GMT

     [ https://issues.apache.org/jira/browse/SOLR-10285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cao Manh Dat reopened SOLR-10285:
---------------------------------

> Skip LEADER messages when there are leader only shards
> ------------------------------------------------------
>
>                 Key: SOLR-10285
>                 URL: https://issues.apache.org/jira/browse/SOLR-10285
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Varun Thacker
>            Assignee: Cao Manh Dat
>             Fix For: 7.1, master (8.0)
>
>         Attachments: SOLR-10285.patch, SOLR-10285.patch, SOLR-10285.patch
>
>
> For shards which have 1 replica ( leader ) we know it doesn't need to recover from anyone.
We should short-circuit the recovery process in this case. 
> The motivation for this being that we will generate less state events and be able to
mark these replicas as active again without it needing to go into 'recovering' state. 
> We already short circuit when you set {{-Dsolrcloud.skip.autorecovery=true}} but that
sys prop was meant for tests only. Extending this to make sure the code short-circuits when
the core knows its the only replica in the shard is the motivation of the Jira.



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