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https://issues.apache.org/jira/browse/HDDS-7844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen O'Donnell resolved HDDS-7844.
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Fix Version/s: 1.4.0
Resolution: Fixed
> EC: Add normal and low priority to replication supervisor and commands
> ----------------------------------------------------------------------
>
> Key: HDDS-7844
> URL: https://issues.apache.org/jira/browse/HDDS-7844
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Datanode, SCM
> Reporter: Stephen O'Donnell
> Assignee: Stephen O'Donnell
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.4.0
>
>
> In order to allow replication commands to fix under and mis-replication to
> run with higher priority that replication commands related to the balancer,
> we will change the replication supervisor to be a priority queue, ordered by
> priority, enqueue time.
> Commands sent from the balancer will have a low priority, other commands will
> a normal priority. This means that balancer commands will not run while there
> are other replication commands present in the queue.
> This means it is not important if the balancer adds a lot of replication
> commands to the queue and then some nodes go down in the cluster. The
> replication commands related to the down nodes will automatically get to the
> front of the queue.
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