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Posted to oak-issues@jackrabbit.apache.org by "Angela Schreiber (Jira)" <ji...@apache.org> on 2023/10/04 11:49:00 UTC

[jira] [Commented] (OAK-10451) UserPrincipalProvider may cause many conflicts when under load

    [ https://issues.apache.org/jira/browse/OAK-10451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17771830#comment-17771830 ] 

Angela Schreiber commented on OAK-10451:
----------------------------------------

hi [~nscendoni], thanks for reporting this ticket. since have been working on this i added you to the contributors list and assigned the ticket to you. hope that is ok for you.

> 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
>            Reporter: Nicola Scendoni
>            Assignee: Nicola Scendoni
>            Priority: Major
>
> 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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