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

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

     [ https://issues.apache.org/jira/browse/HDDS-9257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siddhant Sangwan updated HDDS-9257:
-----------------------------------
    Fix Version/s: 1.4.0

> 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
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.4.0
>
>
> 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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