Configured eviction bases on COUNT will unexpected start eviction to early and might evict until the cache is empty ------------------------------------------------------------------------------------------------------------------- Key: ISPN-10645 URL: https://issues.jboss.org/browse/ISPN-10645 Project: Infinispan Issue Type: Bug Components: Core Affects Versions: 10.0.0.CR2 Reporter: Wolf-Dieter Fink Assignee: Will Burns Priority: Major If a cache is populated and configured with eviction and maybe expiration the eviction will start earlier than expected and the size count will go down to more or less 0. Assume the cache is configured like this <distributed-cache name="ExpirationCache"> <memory> <binary eviction="COUNT" size="120"/> </memory> <expiration lifespan="60000" interval="-1"/> </distributed-cache> The client is simple and add a new entry every second to keep the monitoring simple minute 1 - entries are added up to ~59 without eviction minute 2 - entries are added but the cache.size() is still 59 CLI check attribute number_of_entries and evictions for the cache shows the same size and no eviction minute 3 - continue adding, cache.size()==59 but CLI shows the same size and increasing evictions minute 4 - still adding but size() decrease as well as CLI n-o-e and evictions grow The fact is that having less than 120 entries in the cache is unexpected as well as remove more entries after a time. The issue remain for <off-heap> and <object> with object count. as well as without exiration element or configured with interval - here the entries are expiring but eviction will have effects as well and drop the cache content unexpected. So it seems not releated to expiration at all