diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java index 6f99f44..419f051 100644 --- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java @@ -1279,8 +1279,9 @@ public class StochasticLoadBalancer extends BaseLoadBalancer { } // We normalize locality to be a score between 0 and 1.0 representing how good it - // is compared to how good it could be - locality /= bestLocality; + // is compared to how good it could be. If bestLocality is 0, assume locality is 100 + // (and the cost is 0) + locality = bestLocality == 0 ? 1 : locality / bestLocality; } @Override @@ -1291,7 +1292,7 @@ public class StochasticLoadBalancer extends BaseLoadBalancer { return; } double localityDelta = getWeightedLocality(region, newEntity) - getWeightedLocality(region, oldEntity); - double normalizedDelta = localityDelta / bestLocality; + double normalizedDelta = bestLocality == 0 ? 0.0 : localityDelta / bestLocality; locality += normalizedDelta; }