Better check + CI test

.travis.yml

@@ -34,6 +34,7 @@ install:
 
 script:
 - docker ps
+- docker stop appwrite-maintenance
 - docker-compose logs appwrite
 - docker-compose exec appwrite doctor
 - docker-compose exec appwrite vars

app/workers/functions.php

@@ -278,8 +278,8 @@ class FunctionsV1
             'time' => 0,
         ]);
 
-        if(false === $execution) {
-            throw new Exception('Failed to create execution');
+        if(false === $execution || ($execution instanceof Document && $execution->isEmpty())) {
+            throw new Exception('Failed to create or read execution');
         }
         
         Authorization::reset();