HDFS-13692. StorageInfoDefragmenter floods log when compacting StorageInfo TreeSet. Contributed by Bharat Viswanadham.

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

@@ -4576,7 +4576,7 @@ public class BlockManager implements BlockStatsMXBean {
               datanodesAndStorages.add(node.getDatanodeUuid());
               datanodesAndStorages.add(storage.getStorageID());
             }
-            LOG.info("StorageInfo TreeSet fill ratio {} : {}{}",
+            LOG.debug("StorageInfo TreeSet fill ratio {} : {}{}",
                      storage.getStorageID(), ratio,
                      (ratio < storageInfoDefragmentRatio)
                      ? " (queued for defragmentation)" : "");