[jira] [Created] (HBASE-24720) Meta replicas not cleaned when disabled

["Szabolcs Bukros (Jira)" <ji...@apache.org>]

Szabolcs Bukros created HBASE-24720:
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             Summary: 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: 2.2.5, 3.0.0-alpha-1, 2.3.0, 2.4.0
            Reporter: Szabolcs Bukros
            Assignee: Szabolcs Bukros


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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