Re: [I] Index Task crashes in middle manager when ingesting JSON keys that contain a comma (druid)

["ArvinZheng (via GitHub)" <gi...@apache.org>]

ArvinZheng commented on issue #15736:
URL: https://github.com/apache/druid/issues/15736#issuecomment-2406184430

   Hi @winsmith , @asdf2014 , this is because the column name `A,B` contains comma and it is stored into `meta.smooth` as is. I think we should document allowed or disallowed characters for column names in the following section. 
   https://github.com/apache/druid/blob/a6236c3d15f6bad044bce851092810fd27ce6df5/docs/ingestion/ingestion-spec.md?plain=1#L247


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