[xwiki-devs] Weird issue in security cache

Hi XWiki devs, We ran into a weird issue on XWiki security cache. Our entire security cache is purged every 4 hours. Some background about our setup: We retrieve users’ group membership from LDAP We set a 4 hour expiration time on the cache(as below) because LDAP records may update at any time. <local-cache name="platform.security.authorization.cache"> <eviction max-entries="50000" strategy="LRU"/> <-- 4 hours --> <expiration lifespan="14400000"/> </local-cache> To our understanding, each cache entry should have its own timer which expires after 4 hours. But what we observe from JMX dashboard is that the entire security cache is being purged every 4 hours. Security cache JMX diagram: <http://xwiki.475771.n2.nabble.com/file/t396587/Security_Cache.png> Our user group has similar issue but purge irregularly: <http://xwiki.475771.n2.nabble.com/file/t396587/Group_Cache.png> This problem is cause big performance issue in our system. We can’t figure out the root case. Any pointer will be highly appreciated. -- Sent from: http://xwiki.475771.n2.nabble.com/XWiki-Dev-f475773.html