lirui-apache commented on pull request #15712:
URL: https://github.com/apache/flink/pull/15712#issuecomment-833360499


   Hi @hehuiyuan , I think hive-2.0.0 doesn't support writing empty maps into 
parquet table: related to HIVE-13632.
   Could you elaborate how you encountered this issue? E.g. how are the parquet 
files generated?


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