Ethan Rose created HDDS-9280:
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Summary: 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
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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