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Posted to issues@lucene.apache.org by "Houston Putman (Jira)" <ji...@apache.org> on 2020/04/06 15:46:00 UTC
[jira] [Comment Edited] (SOLR-14389) Support dynamic
reconfiguration of Zookeeper ensemble
[ https://issues.apache.org/jira/browse/SOLR-14389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17076425#comment-17076425 ]
Houston Putman edited comment on SOLR-14389 at 4/6/20, 3:45 PM:
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It's amazing to me that something like the solution mentioned in "Rebalancing Client Connections" is not provided as a standard option within the Zookeeper client code. Anyways, we should write a class to support this. Maybe Curator will already have the functionality when we move to it, but that's a much longer term project.
was (Author: houston):
It's amazing to me that something like the solution mentioned ini "Rebalancing Client Connections" is not provided as a standard option within the Zookeeper client code. Anyways, we should write a class to support this. Maybe Curator will already have the functionality when we move to it, but that's a much longer term project.
> Support dynamic reconfiguration of Zookeeper ensemble
> -----------------------------------------------------
>
> Key: SOLR-14389
> URL: https://issues.apache.org/jira/browse/SOLR-14389
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Reporter: Jan Høydahl
> Priority: Major
>
> Spinoff from SOLR-14371.
> Zookeeper has got support for dynamic reconfiguration since v3.5 (See https://zookeeper.apache.org/doc/r3.6.0/zookeeperReconfig.html). But users need to actively start using it. Currently Solr treats the {{ZK_HOST}} var / {{-DzkHost}} sysprop as a static truth, and will only ever attempt to connect to the hosts originally included in the connection string.
> This issue aims to implement "Rebalancing Client Connections" as described in last paragrah in above link. This will let sys admins extend or change their ensemble, and Solr nodes will update and re-balance, as long as at least one of the zk hosts are still in the static {{ZK_HOST}} list.
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