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https://issues.apache.org/jira/browse/SOLR-15138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17308004#comment-17308004
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ASF subversion and git services commented on SOLR-15138:
--------------------------------------------------------

Commit 2d32cca8061d95d0b469c9de218d707f73ef6429 in solr's branch 
refs/heads/branch_8_8 from Ishan Chattopadhyaya
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=2d32cca ]

SOLR-15138: Collection creation for PerReplicaStates does not scale to large 
collections as well as regular collections (closes #2359 and #2318)


> PerReplicaStates does not scale to large collections as well as state.json
> --------------------------------------------------------------------------
>
>                 Key: SOLR-15138
>                 URL: https://issues.apache.org/jira/browse/SOLR-15138
>             Project: Solr
>          Issue Type: Bug
>          Components: SolrCloud
>    Affects Versions: 8.8
>            Reporter: Mike Drob
>            Assignee: Noble Paul
>            Priority: Major
>             Fix For: 8.9
>
>          Time Spent: 3h 40m
>  Remaining Estimate: 0h
>
> I was testing PRS collection creation with larger collections today 
> (previously I had tested with many small collections) and it seemed to be 
> having trouble keeping up.
>  
> I was running a 4 node instance, each JVM with 4G Heap in k8s, and a single 
> zookeeper.
>  
> With this cluster configuration, I am able to create several (at least 10) 
> collections with 11 shards and 11 replicas using the "old way" of keeping 
> state. These collections are created serially, waiting for all replicas to be 
> active before proceeding.
> However, when attempting to do the same with PRS, the creation stalls on 
> collection 2 or 3, with several replicas stuck in a "down" state. Further, 
> when attempting to delete these collections using the regular API it 
> sometimes takes several attempts after getting stuck a few times as well.



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