dongkelun commented on pull request #3502:
URL: https://github.com/apache/hudi/pull/3502#issuecomment-907640353


   There is no problem with the local virtual machine verification. The reason 
for the problem mentioned above is that the schema of producer is not 
completely consistent with the schema obtained by Hudi 
JdbcbasedSchemaProvider.The specific differences are as follows:
   The producer shcema's field:
   ```java
   {"name": "userId", "type": "string"}
   ```
   The JdbcbasedSchemaProvider's field:
   ```java
   {"name": "userid", "type":["null","string"],"default":null}
   ```
   
   Modify producer shcema's field to '{name ":" userid "," type ": [" null "," 
string "]," default ": null}' or '{name": "userid", "type": ["null", 
"string"]}',Then it can run normally


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