@i_am_dba  This is a very difficult one to explain.  I think the issue is the string schema, or removing the avro schema you mentioned.  My first suggestion would be to try to specific the schema which should help getting the data into the right formats.   An alternate solution is to try and do that manually by replacetext/regex,etc but that is not the ideal solution.   That said, another higher level suggesting is to update the upstream datasource to permanently solve the instability from '' (blank string), 'null' (string), or actual NULL (not a blank, '', or string at all). ... View more