[jira] [Commented] (SENTRY-1918) NN snapshot should not be served while HMS snapshot is collected

["Brian Towles (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SENTRY-1918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16154603#comment-16154603 ] 

Brian Towles commented on SENTRY-1918:
--------------------------------------

Im going to add a function to the SentryService in order to pass through a check to the HMSFollower if a FullSnapshot is running.  As well the DBUpdateForwarder will check the SentryService (getting it from changes to the SentryServiceFactory) to see if the Full Snapshot is running before returning a full snapshot.  If a Full Snapshot is running then it will return an empty result until the full snapshot is done.

> NN snapshot should not be served while HMS snapshot is collected
> ----------------------------------------------------------------
>
>                 Key: SENTRY-1918
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1918
>             Project: Sentry
>          Issue Type: Bug
>          Components: Sentry
>    Affects Versions: 2.0.0
>            Reporter: Alexander Kolbasov
>            Assignee: Brian Towles
>
> While Sentry collects full HMS snapshot, Namenode still sends requests to sentry and may request a full snapshot which is useless because a new one will be available shortly. It is important to prevent this from happening so that we do not collect two snapshots in memory at the same time.



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