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https://issues.apache.org/jira/browse/OAK-10451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17854326#comment-17854326
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Julian Reschke commented on OAK-10451:
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[WARNING] Files with unapproved licenses:
/home/jenkins/jenkins-agent/workspace/Jackrabbit/jackrabbit-oak-trunk/oak-core/src/test/java/org/apache/jackrabbit/oak/security/user/PrincipalMembershipReaderTest.java
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> UserPrincipalProvider may cause many conflicts when under load
> --------------------------------------------------------------
>
> Key: OAK-10451
> URL: https://issues.apache.org/jira/browse/OAK-10451
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: core, security
> Reporter: Nicola Scendoni
> Assignee: Nicola Scendoni
> Priority: Major
> Attachments: LoginTest_20231010_172626_with_patch.csv,
> LoginTest_20231010_173013_without_patch.csv
>
>
> UserPrincipalProvider can be configured to periodically cache group
> membership by writing group principals on a rep:cache node. This will result
> in thundering herd problem when the system is under load and the expiration
> time for the cache is reached. Incoming requests that authenticate
> concurrently will all try to refresh the cache and cause conflicts because
> each request tries to set a new expiration time that is slightly different
> from the others.
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