[jira] [Commented] (SENTRY-1854) HMSFollower should handle notifications even if HDFS sync is disabled.

["Alexander Kolbasov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SENTRY-1854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16254155#comment-16254155 ] 

Alexander Kolbasov commented on SENTRY-1854:
--------------------------------------------

[~lina.li] I don't see a patch attached to this JIRA - what happened to it?

> HMSFollower should handle notifications even if HDFS sync is disabled.
> ----------------------------------------------------------------------
>
>                 Key: SENTRY-1854
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1854
>             Project: Sentry
>          Issue Type: Sub-task
>          Components: Sentry
>    Affects Versions: 2.0.0
>            Reporter: Na Li
>            Assignee: Na Li
>             Fix For: 2.0.0
>
>
> Currently, Sentry does not start HMSFollower when HDFS sync is disabled. This breaks PERM sync. For example, when a table/database is dropped, its permission should be removed when perm sync is enabled. Without HMSFollower, Sentry does not know when table/database is dropped, and therefore, cannot remove the permission accordingly.
> Sentry needs to make updates to have the follow behavior
> 1) When HDFS sync is disabled + PERM sync is disabled, do not start HMSFollower
> 2) when HDFS sync is enabled or PERM sync is enabled, start HMSFollower (Sentry change).
> 3) when HDFS sync is enabled, we save path change and perm change. nothing more. 
> 4) when perm sync is enabled, we update perm when table/database is created, dropped or altered, nothing more.



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