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https://issues.apache.org/jira/browse/SENTRY-1669?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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kalyan kumar kalvagadda updated SENTRY-1669:
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Attachment: SENTRY-1669.008-sentry-ha-redesign.patch
Updating the rebased patch.
> HMSFollower should read current processed notification ID from database every
> time it runs
> ------------------------------------------------------------------------------------------
>
> Key: SENTRY-1669
> URL: https://issues.apache.org/jira/browse/SENTRY-1669
> Project: Sentry
> Issue Type: Sub-task
> Components: Hdfs Plugin
> Affects Versions: sentry-ha-redesign
> Reporter: Hao Hao
> Assignee: kalyan kumar kalvagadda
> Priority: Blocker
> Fix For: sentry-ha-redesign
>
> Attachments: SENTRY-1669.001-sentry-ha-redesign.patch,
> SENTRY-1669.002-sentry-ha-redesign.patch,
> SENTRY-1669.003-sentry-ha-redesign.patch,
> SENTRY-1669.004-sentry-ha-redesign.patch,
> SENTRY-1669.005-sentry-ha-redesign.patch,
> SENTRY-1669.006-sentry-ha-redesign.patch,
> SENTRY-1669.007-sentry-ha-redesign.patch,
> SENTRY-1669.008-sentry-ha-redesign.patch
>
>
> Instead of using in-memory current processed notification ID, HMSFollower
> should read the processed notification ID info from database every time it
> runs. Otherwise, after failover, the new leader cannot get the correct
> up-to-date processed notification ID.
> It should also update the Notification ID to database once it processes a
> notification event. The Notification ID in database should keep on increase
> (we don't handle its overflow scenario).
> notification id is also available in SENTRY_PATH_CHANGE table but it is not
> dependable to get the last notification processed. Sentry server can not
> depend on this information to get the last notification that the server
> processed as it not guaranteed that every notification will make it to
> SENTRY_PATH_CHANGE. Under various conditions notifications will not make it
> to SENTRY_PATH_CHANGE table so we need separate table to store the ID's.
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