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https://issues.apache.org/jira/browse/HDDS-8536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddhant Sangwan resolved HDDS-8536.
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Target Version/s: 1.4.0
Resolution: Fixed
> ReplicationManager: Unhealthy replicas could block Ratis containers being
> recovered
> -----------------------------------------------------------------------------------
>
> Key: HDDS-8536
> URL: https://issues.apache.org/jira/browse/HDDS-8536
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: SCM
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Labels: pull-request-available
>
> In a similar way to HDDS-8535, if the cluster is small, say 4 nodes and a
> Ratis container has 2 unhealthy containers, RM will currently recover one new
> replia, leaving all 4 nodes used with 2 healthy and 2 unhealthy. As unhealthy
> containers are only removed after all over and under replication has been
> resolved, the container will remain stuck like this.
> To avoid this, if there are insufficient spare nodes and also some unhealthy
> containers, then the under replication handler may need to call into the
> unhealthy handler to remove some of the unhealthy replicas to allow progress
> to be made.
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