From 17df4f08d3c8750b9f61153abf0386962aadd1ba Mon Sep 17 00:00:00 2001
From: Gabor Bota <gabor.bota@cloudera.com>
Date: Thu, 19 Sep 2019 16:55:43 +0200
Subject: [PATCH] fix in mkdir

Change-Id: Icd30c23f5606431bbdbd690f52adec30453ee19d
---
 .../src/main/java/org/apache/hadoop/fs/shell/Mkdir.java    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Mkdir.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Mkdir.java
index 5828b0bbf4ddd..b513e08ce671c 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Mkdir.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/shell/Mkdir.java
@@ -73,6 +73,13 @@ protected void processNonexistentPath(PathData item) throws IOException {
       // we want a/b
       final Path itemPath = new Path(item.path.toString());
       final Path itemParentPath = itemPath.getParent();
+
+      if(itemParentPath == null) {
+        throw new PathNotFoundException(String.format(
+            "Item: %s parent path's is null. This can happen if mkdir is " +
+                "called on root, so there's no parent.", itemPath.toString()));
+      }
+
       if (!item.fs.exists(itemParentPath)) {
         throw new PathNotFoundException(itemParentPath.toString());
       }