Revert "HDFS-9210. Fix some misuse of %n in VolumeScanner#printStats. Contributed by Xiaoyu Yao."

This reverts commit 3d5085595286c0231f66543d1509247ad4bb5739.

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -2060,8 +2060,6 @@ Release 2.8.0 - UNRELEASED
     HDFS-9187. Fix null pointer error in Globber when FS was not constructed
     via FileSystem#createFileSystem (cmccabe)
 
-    HDFS-9210. Fix some misuse of %n in VolumeScanner#printStats. (xyao)
-
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/VolumeScanner.java

@@ -216,8 +216,9 @@ public class VolumeScanner extends Thread {
   }
 
   public void printStats(StringBuilder p) {
-    p.append(String.format("Block scanner information for volume %s with base" +
-        " path %s%n" + volume.getStorageID(), volume.getBasePath()));
+    p.append("Block scanner information for volume " +
+        volume.getStorageID() + " with base path " + volume.getBasePath() +
+        "%n");
     synchronized (stats) {
       p.append(String.format("Bytes verified in last hour       : %57d%n",
           stats.bytesScannedInPastHour));
@@ -244,7 +245,7 @@ public class VolumeScanner extends Thread {
           stats.lastBlockScanned.toString())));
       p.append(String.format("More blocks to scan in period     : %57s%n",
           !stats.eof));
-      p.append(String.format("%n"));
+      p.append("%n");
     }
   }