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Posted to issues@hbase.apache.org by "Xiaolin Ha (Jira)" <ji...@apache.org> on 2021/03/05 11:48:00 UTC
[jira] [Updated] (HBASE-25635) CandidateGenerator may miss some
region balance actions
[ https://issues.apache.org/jira/browse/HBASE-25635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiaolin Ha updated HBASE-25635:
-------------------------------
Attachment: 1614940188041-image.png
> CandidateGenerator may miss some region balance actions
> -------------------------------------------------------
>
> Key: HBASE-25635
> URL: https://issues.apache.org/jira/browse/HBASE-25635
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Xiaolin Ha
> Assignee: Xiaolin Ha
> Priority: Major
> Attachments: 1614940188041-image.png
>
>
> {color:#172b4d}In codes of CandidateGenerator#getAction(),valid region index are greater or equal to zero. Currently only regions with greater than zero indexes can get balance actions.{color}
> {code:java}
> protected BaseLoadBalancer.Cluster.Action getAction(int fromServer, int fromRegion,
> int toServer, int toRegion) {
> if (fromServer < 0 || toServer < 0) {
> return BaseLoadBalancer.Cluster.NullAction;
> }
> if (fromRegion > 0 && toRegion > 0) {
> return new BaseLoadBalancer.Cluster.SwapRegionsAction(fromServer, fromRegion,
> toServer, toRegion);
> } else if (fromRegion > 0) {
> return new BaseLoadBalancer.Cluster.MoveRegionAction(fromRegion, fromServer, toServer);
> } else if (toRegion > 0) {
> return new BaseLoadBalancer.Cluster.MoveRegionAction(toRegion, toServer, fromServer);
> } else {
> return BaseLoadBalancer.Cluster.NullAction;
> }
> }{code}
>
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