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https://issues.apache.org/jira/browse/SOLR-14985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved SOLR-14985.
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Fix Version/s: 9.8
Resolution: Fixed
Thanks Aparna, & Shalin!
Note that there are other linked JIRAs to address additional performance
concerns. This is not the only one.
> Slow indexing and search performance when using HttpClusterStateProvider
> ------------------------------------------------------------------------
>
> Key: SOLR-14985
> URL: https://issues.apache.org/jira/browse/SOLR-14985
> Project: Solr
> Issue Type: Bug
> Components: SolrJ
> Reporter: Shalin Shekhar Mangar
> Priority: Major
> Labels: pull-request-available
> Fix For: 9.8
>
> Time Spent: 9h 50m
> Remaining Estimate: 0h
>
> HttpClusterStateProvider fetches and caches Aliases and Live Nodes for 5
> seconds.
> The BaseSolrCloudClient caches DocCollection for 60 seconds but only if the
> DocCollection is not lazy and all collections returned by
> HttpClusterStateProvider are not lazy which means they are never cached.
> The BaseSolrCloudClient has a method for resolving aliases which fetches
> DocCollection for each input collection. This is an HTTP call with no caching
> when using HttpClusterStateProvider. This resolveAliases method is called
> twice for each update.
> So overall, at least 3 HTTP calls are made to fetch cluster state for each
> update request when using HttpClusterStateProvider. There may be more if
> aliases are involved or if more than one collection is specified in the
> request. Similar problems exist on the query path as well.
> Due to these reasons, using HttpClusterStateProvider causes horrible
> latencies and throughput for update and search requests.
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