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https://issues.apache.org/jira/browse/HBASE-24720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Somogyi resolved HBASE-24720.
-----------------------------------
Fix Version/s: 2.2.6
2.4.0
2.3.1
3.0.0-alpha-1
Resolution: Fixed
Thanks for the commit [~bszabolcs]! Pushed to branch-2.2+.
> Meta replicas not cleaned when disabled
> ---------------------------------------
>
> Key: HBASE-24720
> URL: https://issues.apache.org/jira/browse/HBASE-24720
> Project: HBase
> Issue Type: Bug
> Components: read replicas
> Affects Versions: 3.0.0-alpha-1, 2.3.0, 2.4.0, 2.2.5
> Reporter: Szabolcs Bukros
> Assignee: Szabolcs Bukros
> Priority: Minor
> Fix For: 3.0.0-alpha-1, 2.3.1, 2.4.0, 2.2.6
>
>
> The assignMetaReplicas method works kinda like this:
> {code:java}
> void assignMetaReplicas(){
> if (numReplicas <= 1) return;
> //create if needed then assign meta replicas
> unassignExcessMetaReplica(numReplicas);
> }
> {code}
> Now this unassignExcessMetaReplica method is the one that gets rid of the
> replicas we no longer need. It closes them and deletes their zNode.
> Unfortunately this only happens if we decreased the replica number. If we
> disabled it, by setting the replica number to 1 assignMetaReplicas returns
> instantly without cleaning up the no longer needed replicas resulting in
> replicas lingering around.
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