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https://issues.apache.org/jira/browse/SENTRY-2119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16317338#comment-16317338
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kalyan kumar kalvagadda edited comment on SENTRY-2119 at 1/8/18 11:34 PM:
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*Approach-2:* As HMSFollower process the notifications it would know if there
are any notifications that are missed. HMSFollower needs to record/persist them
in a new table.
# Based on configured interval, HMSFollower should schedule a retry of missed
notifications.
# When HMSFollower is able to fetch it on this try, it should clean-up the
entry from the persisted data.
# when the missed event-ids are persisted HMSFollower needs to persist the
current time stamp as well.
# we need to have a time interval to purge this data.
# When the event-id are purged we unblock any HMS threads if needed.
was (Author: kkalyan):
*Approach-2:* As HMSFollower process the notifications it would know if there
are any notifications that are missed. HMSFollower needs to record/persist them
.
# Based on configured interval, HMSFollower should schedule a retry of missed
notifications.
# When HMSFollower is able to fetch it on this try, it should clean-up the
entry from the persisted data.
# when the missed event-ids are persisted HMSFollower needs to persist the
current time stamp as well.
# we need to have a time interval to purge this data.
# When the event-id are purged we unblock any HMS threads if needed.
> HMSFollower may not fetch HMS notifications which are out of order
> ------------------------------------------------------------------
>
> Key: SENTRY-2119
> URL: https://issues.apache.org/jira/browse/SENTRY-2119
> Project: Sentry
> Issue Type: Bug
> Components: Sentry
> Affects Versions: 2.1.0
> Reporter: kalyan kumar kalvagadda
> Assignee: kalyan kumar kalvagadda
>
> With the current implementation of HMS and HMS-HA notifications inserted in
> NOTIFICATION_LOG table can be out of order. That means, notifications with
> smaller event-id's can be inserted into the table later and there is not
> clear understanding on on the time difference between them.
> When this happens HMSFollower will not be able to fetch these notifications.
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