[ https://issues.jboss.org/browse/ISPN-4563?page=com.atlassian.jira.plugin.... ] Galder Zamarreño commented on ISPN-4563: ---------------------------------------- Sebastian, the TCK is correct, {{createCache}} should throw a CacheException if the cache is already known, as indicated in the Javadoc. The problem here is that this kind of API forces you to do this in the cache resolver implementation: {code} Cache ... = getCache(); if (c != null) return c; else ... createCache {code} However, this kind of code will only work if it's synchronized somehow to deal with concurrent environments. The RI follows this pattern too, but it does not synchronize stuff. -- This message was sent by Atlassian JIRA (v6.3.1#6329)