[jboss-jira] [JBoss JIRA] (WFLY-5921) Locale cache set to simple cache automatically breaks map reduce

[Stian Thorgersen (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-5921?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stian Thorgersen closed WFLY-5921.
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    Resolution: Rejected


We're going to detect version of Infinispan and use distributed streams for new version, while maintaining map-reduce for now.

BTW this is the second time we've run into issues with the Infinispan subsystem making changes to defaults, while not allowing actually changing the values. IMO it's not very nice to automatically convert a local-cache to a simple-cache and not even provide an option to disable it.

> Locale cache set to simple cache automatically breaks map reduce
> ----------------------------------------------------------------
>
>                 Key: WFLY-5921
>                 URL: https://issues.jboss.org/browse/WFLY-5921
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 10.0.0.CR5
>            Reporter: Stian Thorgersen
>            Assignee: Paul Ferraro
>            Priority: Critical
>
> We use the Infinispan subsystem to create/configure caches for Keycloak. In standalone mode Keycloak uses locale-caches, while in clustered mode we use a combination of invalidation caches and distributed caches. In both clustered and non-clustered mode we use map-reduce tasks to delete elements from the cache.
> This has worked just fine until the recent change in CR5 where locale-caches are now set to simple-caches (WFLY-5327). As the caches are now automatically set to simple-caches map-reduce is no longer available. There's also no way to prevent this.
> IMO the changes from WFLY-5327 should be reverted and instead a new simple-cache element should be added, or a simple-cache=true attribute added to the locale-cache element.
> As it stands this change prevents us from upgrading to CR5.



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