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Posted to dev@lucene.apache.org by "Scott Blum (JIRA)" <ji...@apache.org> on 2016/02/23 19:30:19 UTC
[jira] [Comment Edited] (SOLR-8696) Start the Overseer before
actions that need the overseer on init and when reconnecting after zk
expiration and improve init logic.
[ https://issues.apache.org/jira/browse/SOLR-8696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159373#comment-15159373 ]
Scott Blum edited comment on SOLR-8696 at 2/23/16 6:30 PM:
-----------------------------------------------------------
Splitting it up sounds like a great idea.
was (Author: dragonsinth):
Splitting it up sound like a great idea.
> Start the Overseer before actions that need the overseer on init and when reconnecting after zk expiration and improve init logic.
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-8696
> URL: https://issues.apache.org/jira/browse/SOLR-8696
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Affects Versions: 5.4.1
> Reporter: Scott Blum
> Assignee: Mark Miller
> Labels: patch, performance, solrcloud, startup
> Attachments: SOLR-8696.patch, SOLR-8696.patch
>
>
> ZkController.publishAndWaitForDownStates() occurs before overseer election. That means if there is currently no overseer, there is ironically no one to actually service the down state changes it's waiting on. This particularly affects a single-node cluster such as you might run locally for development.
> Additionally, we're doing an unnecessary ZkStateReader forced refresh on all Overseer operations. This isn't necessary because ZkStateReader keeps itself up to date.
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