From a5a751b4187c69a6cda66466a3210d81ef54d929 Mon Sep 17 00:00:00 2001
From: Anu Engineer <aengineer@apache.org>
Date: Tue, 26 Feb 2019 14:33:54 -0800
Subject: [PATCH] HDDS-1174. Freon tests are failing with null pointer
 exception. Contributed by Shashikant Banerjee.

---
 .../org/apache/hadoop/ozone/freon/RandomKeyGenerator.java | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java b/hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java
index 650d253b88..a255342679 100644
--- a/hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java
+++ b/hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RandomKeyGenerator.java
@@ -215,7 +215,9 @@ public void init(OzoneConfiguration configuration) throws IOException {
     for (FreonOps ops : FreonOps.values()) {
       histograms.add(ops.ordinal(), new Histogram(new UniformReservoir()));
     }
-    freon.startHttpServer();
+    if (freon != null) {
+      freon.startHttpServer();
+    }
   }
 
   @Override
@@ -296,7 +298,9 @@ private void addShutdownHook() {
     Runtime.getRuntime().addShutdownHook(
         new Thread(() -> {
           printStats(System.out);
-          freon.stopHttpServer();
+          if (freon != null) {
+            freon.stopHttpServer();
+          }
         }));
   }
   /**