From c678866aa12f6038c7feea780a7ef0d3cba41707 Mon Sep 17 00:00:00 2001
From: Emil Koutanov <ekoutanov@gmail.com>
Date: Mon, 10 Jun 2019 14:27:13 +1000
Subject: [PATCH] Fixed NaN on empty cluster (no topics)

---
 pom.xml                                                | 2 +-
 src/main/java/kafdrop/service/CuratorKafkaMonitor.java | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pom.xml b/pom.xml
index 6680d758..7a410320 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.obsidiandynamics.kafdrop</groupId>
     <artifactId>kafdrop</artifactId>
-    <version>3.3.0-SNAPSHOT</version>
+    <version>3.3.1</version>
 
     <description>For when you have a Kafka cluster to monitor</description>
 
diff --git a/src/main/java/kafdrop/service/CuratorKafkaMonitor.java b/src/main/java/kafdrop/service/CuratorKafkaMonitor.java
index 352e703b..3b5429e8 100644
--- a/src/main/java/kafdrop/service/CuratorKafkaMonitor.java
+++ b/src/main/java/kafdrop/service/CuratorKafkaMonitor.java
@@ -196,7 +196,7 @@ public ClusterSummaryVO getClusterSummary(Collection<TopicVO> topics) {
         })
         .orElseGet(ClusterSummaryVO::new);
     topicSummary.setTopicCount(topics.size());
-    topicSummary.setPreferredReplicaPercent(topicSummary.getPreferredReplicaPercent() / topics.size());
+    topicSummary.setPreferredReplicaPercent(topics.isEmpty() ? 0 : topicSummary.getPreferredReplicaPercent() / topics.size());
     return topicSummary;
   }