From 795f43e0ba0387aae9f00d72dcf7803869024358 Mon Sep 17 00:00:00 2001
From: xiaoyu <549477611@qq.com>
Date: Thu, 15 Apr 2021 15:36:07 +0800
Subject: [PATCH] used asSubclass() convert class

---
 .../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 000a185dab70..b40779ade232 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 @@ private void loadCustomCostFunctions(Configuration conf) {
     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());
       }