huaxiangsun commented on a change in pull request #3657:
URL: https://github.com/apache/hbase/pull/3657#discussion_r700583609
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File path:
hbase-balancer/src/main/java/org/apache/hadoop/hbase/master/balancer/PrimaryRegionCountSkewCostFunction.java
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@@ -66,8 +66,12 @@ void prepare(BalancerClusterState cluster) {
@Override
protected void regionMoved(int region, int oldServer, int newServer) {
cost.applyCostsChange(costs -> {
- costs[oldServer] = computeCostForRegionServer(oldServer);
- costs[newServer] = computeCostForRegionServer(newServer);
+ if (region == cluster.regionIndexToPrimaryIndex[region]) {
Review comment:
Can you explain a little bit more about this change? It does not seem
equal to what computeCostForRegionServer() does.
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