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https://issues.apache.org/jira/browse/SENTRY-1463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hao Hao updated SENTRY-1463:
----------------------------
    Description: 
During HMSFollower start up, when retrieving HMS full snapshot, also need to 
ensure point-in-time snapshot consistency.

It should be: 
* Read current HMS notification ID_initial
* Read HMS metadata state
* Read current notification ID_new
* If ID_initial != ID_new then discard the current state and goto 1.

Use configurable property: sentry.hms.snapshot.retries.max.count for max number 
of retry.
Ideally, during fetching full snapshot, there should be no write activity on 
the HMS.


  was:
During HMSFollower start up, when retrieving HMS full snapshot, also need to 
ensure point-in-time snapshot consistency.

It should be: 
* Read current HMS notification ID_initial
* Read HMS metadata state
* Read current notification ID_new
* If ID_initial != ID_new then discard the current state and goto 1.

Ideally, during fetching full snapshot, there should be no write activity on 
the HMS.



> Ensure HMS point-in-time snapshot consistency
> ---------------------------------------------
>
>                 Key: SENTRY-1463
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1463
>             Project: Sentry
>          Issue Type: Sub-task
>          Components: Sentry
>    Affects Versions: sentry-ha-redesign
>            Reporter: Hao Hao
>            Assignee: Hao Hao
>             Fix For: sentry-ha-redesign
>
>         Attachments: SENTRY-1463.001-sentry-ha-redesign.patch
>
>
> During HMSFollower start up, when retrieving HMS full snapshot, also need to 
> ensure point-in-time snapshot consistency.
> It should be: 
> * Read current HMS notification ID_initial
> * Read HMS metadata state
> * Read current notification ID_new
> * If ID_initial != ID_new then discard the current state and goto 1.
> Use configurable property: sentry.hms.snapshot.retries.max.count for max 
> number of retry.
> Ideally, during fetching full snapshot, there should be no write activity on 
> the HMS.



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