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https://issues.apache.org/jira/browse/HDDS-17381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDDS-17381:
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Labels: pull-request-available (was: )
> SCM placement validation creates unnecessary temporary objects
> --------------------------------------------------------------
>
> Key: HDDS-17381
> URL: https://issues.apache.org/jira/browse/HDDS-17381
> Project: Apache Ozone
> Issue Type: Bug
> Reporter: Shuo Huang
> Assignee: Shuo Huang
> Priority: Major
> Labels: pull-request-available
>
> SCMCommonPlacementPolicy#validateContainerPlacement uses groupingBy and
> reducing to count replicas on each rack.
>
> Replication Manager performs this check repeatedly while checking container
> health.
> The replica list is usually small, but the stream collectors create temporary
> objects on every call, adding avoidable allocation and GC overhead in SCM.
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