Check that parent is non-null and of correct type

1 files changed, 5 insertions, 1 deletions

diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainer.java b/config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainer.java
index e1c4bdc3cba..a52b4d915c9 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainer.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/ApplicationContainer.java
@@ -78,7 +78,11 @@ public final class ApplicationContainer extends Container implements
 
     @Override
     public void getConfig(ZookeeperServerConfig.Builder builder) {
-        ((ApplicationContainerCluster)parent).getConfig(builder);
+        AbstractConfigProducer<?> parent = getParent();
+        if (parent == null) return;
+
+        if (parent instanceof ApplicationContainerCluster)
+            ((ApplicationContainerCluster) this.parent).getConfig(builder);
         builder.myid(index());
     }