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https://issues.apache.org/jira/browse/SOLR-16571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17645072#comment-17645072
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David Smiley commented on SOLR-16571:
-------------------------------------
As a side note, even though I also run Solr with tons of cores, I haven't seen
issue because we use FileSystemConfigSetService instead of ZkConfigSetService.
The path is served right out of the read-only docker image. Immutable, fast,
easier to reason about (e.g. version changes), etc.
> Add Java system property for ZooKeeper config watch
> ---------------------------------------------------
>
> Key: SOLR-16571
> URL: https://issues.apache.org/jira/browse/SOLR-16571
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Nick Ginther
> Priority: Minor
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Solr creates a ZooKeeper watch per-core. On nodes with a lot of cores, this
> results in a lot of ZK watches, and thus increased resource consumption. ZK
> config watches aren't strictly necessary, so we should be able to disable
> them if we want to. To remedy this, we should add a Java system property to
> disable the ZK config watch per core. The default behavior should still be to
> create a ZK config watch per core.
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