Naveen Gangam commented on HIVE-15074:

Functionally, it looks good to me. 

Just for semantics to make it consistent with other verify* calls, do we want 
to make it return a boolean to indicate success/failure instead of throwing an 
exception? maybe overload {{verifySchemaVersion()}} that catches the exception 
and returns a boolean? I will defer to [~aihuaxu] for the final call on this.

> Schematool provides a way to detect invalid entries in VERSION table
> --------------------------------------------------------------------
>                 Key: HIVE-15074
>                 URL: https://issues.apache.org/jira/browse/HIVE-15074
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Metastore
>            Reporter: Yongzhi Chen
>            Assignee: Chaoyu Tang
>            Priority: Minor
>         Attachments: HIVE-15074.patch
> For some unknown reason, we see customer's HMS can not start because there 
> are multiple entries in their HMS VERSION table. Schematool should provide a 
> way to validate the HMS db and provide warning and fix options for this kind 
> of issues. 

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