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https://issues.apache.org/jira/browse/SENTRY-1888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16130983#comment-16130983
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Sergio Peña commented on SENTRY-1888:
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FYI [~LinaAtAustin] [~vamsee] [~akolb]
> Sentry might not fetch all HMS duplicated events IDs when requested
> -------------------------------------------------------------------
>
> Key: SENTRY-1888
> URL: https://issues.apache.org/jira/browse/SENTRY-1888
> Project: Sentry
> Issue Type: Bug
> Components: Sentry
> Affects Versions: 2.0.0
> Reporter: Sergio Peña
>
> HMS does not guarantee that each notification has unique IDs. SENTRY-1803
> solved the issue with Sentry to handle those duplicated events IDs. However,
> HMS notifications with duplicated events IDs could appear late on the HMS
> side due to delay issues on the DB (especially on HMS HA mode). These events
> could not be fetched by Sentry if we already processed a duplicated event ID
> before.
> Example:
> 1. HMS 1 attempts to persist event ID = 1
> 2. HMS 2 attempts to persist event ID = 1
> 3. HMS 1 commits event ID = 1
> 4. Sentry fetches notifications >= 1 (bringing the event from HMS 1)
> 5. HMS 2 commits event ID = 1
> 6. Sentry fetches notifications >= 2 (no events are fetched)
> HMS 2 event ID = 1 is never fetched nor processed by Sentry.
> The above scenario could cause Sentry to be out-of-sync because of these
> events that were not committed on time.
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