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https://issues.apache.org/jira/browse/HDDS-9280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddhant Sangwan updated HDDS-9280:
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Attachment: Quasi_dilemma.png
> Quasi-closed container with unhealthy replicas may remain under-replicated in
> 4 node cluster
> --------------------------------------------------------------------------------------------
>
> Key: HDDS-9280
> URL: https://issues.apache.org/jira/browse/HDDS-9280
> Project: Apache Ozone
> Issue Type: Bug
> Components: SCM
> Reporter: Ethan Rose
> Priority: Major
> Attachments: Quasi_dilemma.png
>
>
> This is a follow-up based on discussion around HDDS-8536 in this
> [PR|https://github.com/apache/ozone/pull/5255#discussion_r1322165405].
> Replication manager will try to keep all replicas with unique origin node IDs
> for quasi-closed containers that cannot be closed, while fully replicating
> the healthy replicas. This could require up to 5 replicas to satisfy, for
> example:
> SCM state: Quasi-closed
> Replica states: quasi-closed(origin 1) quasi-closed(origin 1)
> quasi-closed(origin 1) unhealthy(origin 2) unhealthy(origin 3)
> In a 4 node cluster, or a 5 node cluster trying to decommission a node, this
> would remain under-replicated or get stuck. In this case, we need to choose
> how to proceed.
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