HADOOP-11603. Metric Snapshot log can be changed #MetricsSystemImpl.java since all the services will be initialized. Contributed By Brahma Reddy Battula.

(cherry picked from commit 13501053dd95f41ac14091f5bbd79bcb2a3896a3)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java

@@ -33,7 +33,6 @@ import javax.management.ObjectName;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.annotations.VisibleForTesting;
-import java.util.Locale;
 import static com.google.common.base.Preconditions.*;
 
 import org.apache.commons.configuration.PropertiesConfiguration;
@@ -372,7 +371,8 @@ public class MetricsSystemImpl extends MetricsSystem implements MetricsSource {
             }
           }
         }, millis, millis);
-    LOG.info("Scheduled snapshot period at "+ (period/1000) +" second(s).");
+    LOG.info("Scheduled Metric snapshot period at " + (period / 1000)
+        + " second(s).");
   }
 
   synchronized void onTimerEvent() {