From 6cf4fdde61dcd59cf585b3368a71dc6af17c4498 Mon Sep 17 00:00:00 2001
From: xiaoyu <549477611@qq.com>
Date: Fri, 16 Apr 2021 02:04:06 +0800
Subject: [PATCH] HBASE-25776 Use Class.asSubclass to fix the warning in
 StochasticLoadBalancer.loadCustomCostFunctions (#3163)

Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Viraj Jasani <vjasani@apache.org>
---
 .../hadoop/hbase/master/balancer/StochasticLoadBalancer.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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 000a185dab7..b40779ade23 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
@@ -249,7 +249,7 @@ public class StochasticLoadBalancer extends BaseLoadBalancer {
     costFunctions.addAll(Arrays.stream(functionsNames).map(c -> {
       Class<? extends CostFunction> klass = null;
       try {
-        klass = (Class<? extends CostFunction>) Class.forName(c);
+        klass = Class.forName(c).asSubclass(CostFunction.class);
       } catch (ClassNotFoundException e) {
         LOG.warn("Cannot load class " + c + "': " + e.getMessage());
       }