keycloak-aplcache

diff --git a/integration/tomcat/tomcat-core/src/main/java/org/keycloak/adapters/tomcat/AbstractKeycloakAuthenticatorValve.java b/integration/tomcat/tomcat-core/src/main/java/org/keycloak/adapters/tomcat/AbstractKeycloakAuthenticatorValve.java
index f415f9f..7088b46 100755
--- a/integration/tomcat/tomcat-core/src/main/java/org/keycloak/adapters/tomcat/AbstractKeycloakAuthenticatorValve.java
+++ b/integration/tomcat/tomcat-core/src/main/java/org/keycloak/adapters/tomcat/AbstractKeycloakAuthenticatorValve.java
@@ -127,7 +127,9 @@ public abstract class AbstractKeycloakAuthenticatorValve extends FormAuthenticat
     }
 
     protected void beforeStop() {
-        nodesRegistrationManagement.stop();
+        if (nodesRegistrationManagement != null) {
+            nodesRegistrationManagement.stop();
+        }
     }
 
     private static InputStream getJSONFromServletContext(ServletContext servletContext) {