HDFS-11128. CreateEditsLog throws NullPointerException. Contributed by Hanisha Koneru.

(cherry picked from commit 1ae57f0f75695178dc135b0c259d066f7da31c9d)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNStorage.java

@@ -333,7 +333,7 @@ public class NNStorage extends Storage implements Closeable,
    * @param uri URI of a storage directory
    * @return The matching storage directory or null if none found
    */
-  StorageDirectory getStorageDirectory(URI uri) {
+  public StorageDirectory getStorageDirectory(URI uri) {
     try {
       uri = Util.fileAsURI(new File(uri));
       Iterator<StorageDirectory> it = dirIterator();