Require non-null zooKeeperServerAddress in FleetControllerOptions

1 files changed, 1 insertions, 1 deletions

diff --git a/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/FleetControllerOptions.java b/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/FleetControllerOptions.java
index bac6a838300..e116bb28e46 100644
--- a/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/FleetControllerOptions.java
+++ b/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/FleetControllerOptions.java
@@ -178,7 +178,7 @@ public class FleetControllerOptions {
         this.distributionBits = distributionBits;
         this.zooKeeperSessionTimeout = zooKeeperSessionTimeout;
         this.masterZooKeeperCooldownPeriod = masterZooKeeperCooldownPeriod;
-        this.zooKeeperServerAddress = zooKeeperServerAddress;
+        this.zooKeeperServerAddress = Objects.requireNonNull(zooKeeperServerAddress, "zooKeeperServerAddress cannot be null");
         this.maxTransitionTime = maxTransitionTime;
         this.maxInitProgressTime = maxInitProgressTime;
         this.maxPrematureCrashes = maxPrematureCrashes;