[ http://jira.jboss.com/jira/browse/JBCACHE-461?page=comments#action_12348115 ] Bela Ban commented on JBCACHE-461: ---------------------------------- Hmm, from the documentation of ReentrantReadWriteLock: " # Lock downgrading Reentrancy also allows downgrading from the write lock to a read lock, by acquiring the write lock, then the read lock and then releasing the write lock. However, upgrading from a read lock to the write lock is not possible. " Upgrading is essential for JBossCache, so we should inquire (concurrency-interest mailing list) *why* this is not supported. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira