From 85c04481011acede3e7292d2b260ddf28084cb61 Mon Sep 17 00:00:00 2001
From: Andreas Weise <a.weise@avm.de>
Date: Fri, 16 Feb 2018 22:45:59 +0100
Subject: [PATCH] ZEPPELIN-3241: NPE when restarting Interpreter

---
 .../src/main/java/org/apache/zeppelin/notebook/Paragraph.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java b/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
index 20f9ff863bf..76c48c844ca 100644
--- a/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
+++ b/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/Paragraph.java
@@ -728,7 +728,7 @@ public void updateRuntimeInfos(String label, String tooltip, Map<String, String>
    * @param settingId
    */
   public void clearRuntimeInfo(String settingId) {
-    if (settingId != null) {
+    if (settingId != null && runtimeInfos != null) {
       Set<String> keys = runtimeInfos.keySet();
       if (keys.size() > 0) {
         List<String> infosToRemove = new ArrayList<>();