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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