[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 reopened WFLY-5921:
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Currently we have to support both older version of Infinispan (from EAP 6.4) as well as newer version from WildFly so this doesn't work for us. Once we no longer need to support EAP 6.4 we can probably migrate to distributed streams.

However, that's not really relevant. The issue here is that the cache is being set to simple-cache without giving us the ability to change that. I assume distributed streams won't be available to simple caches either.

> 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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