Prasanth Jayachandran commented on HIVE-18659:

I agree that it's safer and consistent to have version info on the file itself. 
But if the side file and version in the footer exists then we should have a 
precedence for source of truth and probably raise an exception if the version 
differs. +1 for the current patch, pending tests. Can you please create a 
follow up for fixing the side file version update + fixes?

> add acid version marker to acid files
> -------------------------------------
>                 Key: HIVE-18659
>                 URL: https://issues.apache.org/jira/browse/HIVE-18659
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Major
>         Attachments: HIVE-18659.01.patch
> add acid version marker to acid files so that we know which version of acid 
> wrote the file

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