HDFS-13130. Log object instance get incorrectly in SlowDiskTracker. Contributed by Jianfei Jiang.

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/SlowDiskTracker.java

@@ -53,7 +53,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 @InterfaceStability.Unstable
 public class SlowDiskTracker {
   public static final Logger LOG =
-      LoggerFactory.getLogger(SlowPeerTracker.class);
+      LoggerFactory.getLogger(SlowDiskTracker.class);
 
   /**
    * Time duration after which a report is considered stale. This is