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https://issues.apache.org/jira/browse/SOLR-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13123707#comment-13123707
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Mark Miller commented on SOLR-2765:
-----------------------------------
bq. The overseer will have to update this when nodes disappear
We don't actually currently remove info about a shard when it goes away - this
allows Solr to know that a part of the index is missing if all replicas in a
slice go own. Eventually we will offer partial results with a warning in this
case - currently we return an error. Instead, clients reconcile the cluster
layout with the live nodes listing (ephemerals) to see what is up. It's
expected that every shard that comes up and registers should at some point come
back if it goes down - unless it's 'manually' removed from zk.
> Shard/Node states
> -----------------
>
> Key: SOLR-2765
> URL: https://issues.apache.org/jira/browse/SOLR-2765
> Project: Solr
> Issue Type: Sub-task
> Components: SolrCloud, update
> Reporter: Yonik Seeley
> Fix For: 4.0
>
> Attachments: combined.patch, incremental_update.patch,
> scheduled_executors.patch, shard-roles.patch
>
>
> Need state for shards that indicate they are recovering, active/enabled, or
> disabled.
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