duynguyenhoang commented on issue #13795:
URL: https://github.com/apache/superset/issues/13795#issuecomment-882937019


   @paulvanharen, basically Superset requires 3 cache configs.
   
   ```
   # Default cache for Superset objects
   CACHE_CONFIG: CacheConfig = {"CACHE_TYPE": "null"}
   
   # Cache for datasource metadata and query results
   DATA_CACHE_CONFIG: CacheConfig = {"CACHE_TYPE": "null"}
   
   THUMBNAIL_CACHE_CONFIG: CacheConfig = {
       "CACHE_TYPE": "null",
       "CACHE_NO_NULL_WARNING": True,
   }
   ```
   
   Your config does work for `DATA_CACHE_CONFIG`. But you don't have 
`CACHE_CONFIG` so that why you got that Warning.
   You can either config CACHE_CONFIG or disable warning by adding 
`"CACHE_NO_NULL_WARNING": True,`
    Hope this helps you.
   


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