[keycloak-dev] Cache empty result for client service account user lookup

[Johannes Knutsen]

Thanks for your feedback.
Yes, I am aware of adding an index manually will resolve this issue
and we will do that. However, I think that these kind of indexes
should come with Keycloak automatically and not be required to add
manually.

Are there any official view on this issue? Is it expected that we
should add indexes ourselves?
I would like to point out that the same issue seems to cause long
response times when saving client configuration in the admin UI when
you have a few hundred thousands of users in the user store.

- Johannes

On Thu, Sep 19, 2019 at 7:44 PM Ioan Eugen Stan <ieugen at netdava.com> wrote:
>
> Hi,
>
> You probably did it but I am going to say it anyway. You can add an index manually without issues. The index is transparent and probably will not aftect inserts.  this is a workaround. Very nice of you for reporting it.
>
> I don't know if/how keycloak handles the DB details => are there guides on how to handle situations like the above, in the db.
>
> Personally I chose to embrace SQL and prefer it to Java whenever possible.
>
>
>
> Eugen Stan
> Netdava International
>
>
>           Mesaj original
>
>
>
> De la: johannes at kodet.no
> Trimis: 19 septembrie 2019 20:26
> Către: keycloak-dev at lists.jboss.org
> Subiect: [keycloak-dev] Cache empty result for client service account user lookup
>
>
> We have a performance issue with the token exchange service in a realm
> with a large amount of users.
>
> The problem seems to be that token exchange uses client permissions to
> evaluate if a client to client token exchange is allowed. The client
> permissions evaluator
> (org.keycloak.services.resources.admin.permissions.ClientPermissions#canExchangeTo)
> creates a new ClientModelIdentity object which in the constructor also
> loads the client's service account user model, if one exists.
> The service account user lookup result for clients without service
> account enabled, isn't cached. Since the service_account_client_link
> column in the user_entity database table isn't indexed, this lookup
> causes a table scan which takes several seconds for each token
> exchange.
>
> One way to solve this, is to cache the empty service account user lookup.
> I have pushed a proof of concept at
> https://github.com/keycloak/keycloak/compare/master...knutz3n:cache-empty-client-service-account-result
>
> Is this something you would consider merging? Do you have suggestions
> for improvement on this fix? Do you know of other places which must
> trigger an eviction in addition to
> org.keycloak.services.managers.ClientManager#enableServiceAccount?
>
> - Johannes
> _______________________________________________
> keycloak-dev mailing list
> keycloak-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/keycloak-dev