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https://issues.apache.org/jira/browse/SENTRY-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854729#comment-15854729
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Alexander Kolbasov commented on SENTRY-1615:
--------------------------------------------

I also noticed that we have a bunch of places where we check queries returning 
lists for null values - it doesn't seem to be part of Datanucleus API - it 
should always return values, so I removed these checks as well.

> SentryStore should not allocate empty objects that are immediately returned
> ---------------------------------------------------------------------------
>
>                 Key: SENTRY-1615
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1615
>             Project: Sentry
>          Issue Type: Improvement
>          Components: Sentry
>    Affects Versions: 1.8.0, sentry-ha-redesign
>            Reporter: Alexander Kolbasov
>            Assignee: Alexander Kolbasov
>            Priority: Minor
>         Attachments: SENTRY-1615.001.patch
>
>
> There are a few places where SentryStore returns some empty lists or sets - 
> it shouldn't allocate them but return pre-made Collection objects.



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