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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8696) Optimize overseer + startup
Date Sat, 20 Feb 2016 22:05:18 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15155773#comment-15155773
] 

Mark Miller commented on SOLR-8696:
-----------------------------------

bq. The only local changes I have are to comment out the calls to the other tests in that
class so that testAddAndDeleteReplica is the only test method run.

Same single change I made. Strange.

> Optimize overseer + startup
> ---------------------------
>
>                 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
>              Labels: patch, performance, solrcloud, startup
>         Attachments: 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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