diff --git a/apps/application.yml b/apps/application.yml
index 83872e12..e14fd77c 100644
--- a/apps/application.yml
+++ b/apps/application.yml
@@ -38,7 +38,7 @@
             msg: "{{appname}}"
         - debug:
             msg: "hahha"
-          when: env_content.stdout.find('APP_HTTP_PORT') != -1
+          when: env_content is not none and env_content.stdout.find('APP_HTTP_PORT') != -1
   roles:
 
     - { role: role_nginx, tags: "role_nginx", when: env_content.stdout.find('APP_HTTP_PORT') != -1 }