[jira] [Created] (HDDS-9257) LegacyReplicationManager: Unhealthy replicas could block under replication handling

["Siddhant Sangwan (Jira)" <ji...@apache.org>]

Siddhant Sangwan created HDDS-9257:
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             Summary: LegacyReplicationManager: Unhealthy replicas could block under replication handling
                 Key: HDDS-9257
                 URL: https://issues.apache.org/jira/browse/HDDS-9257
             Project: Apache Ozone
          Issue Type: Sub-task
          Components: SCM
            Reporter: Siddhant Sangwan
            Assignee: Siddhant Sangwan


The legacy replication manager currently resolves mismatched replicas (those whose replica state do not match SCM's container state) by
1. Replicating the matching replicas until they are fully replicated.
2. Deleting the mismatched replicas.
This approach does not work when LRM is presented with the following situation:
SCM state: CLOSED
5 datanodes in the cluster
Replica states CLOSED CLOSED QUASI QUASI QUASI
LRM will not make progress because there is no datanode to add a closed replica to that does not already have a replica.



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