diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
index b79ab5b5bcf02..84a197f6bbcad 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
@@ -642,6 +642,7 @@ void resetData(Configuration conf) {
     this.underUtilized.clear();
     this.policy.reset();
     dispatcher.reset(conf);
+    if (metrics!=null) DefaultMetricsSystem.instance().unregisterSource(metrics.getName());
   }
 
   NameNodeConnector getNnc() {