[GitHub] [doris] stalary commented on pull request #18438: [fix](es) ClassCastException when getting root schema

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stalary commented on PR #18438:
URL: https://github.com/apache/doris/pull/18438#issuecomment-1501303722

   > I think we are not having the same problem. The problem I have encountered 
is that when calling the `getRootSchema` method, when the `mappingType` is null 
and there is `dynamic` parameter in the mapping json, since the first element 
obtained by traversing the mapping json through the iterator is `dynamic`, and 
its type is `TextNode`, a `ClassCastException` will appear when running the 
following code：
   > 
   > ```java
   > ObjectNode firstData = (ObjectNode) mappings.get(firstType);
   > ```
   > 
   > All this happens before calling the `replaceFieldAlias` method.
   
   Okey, I get it.


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