Why there is a difference between the API call size() and the JMX clustered stats numberOfEntries when counting the entries within the JDG cache

Issue

• The Cache API size() shows the correct number of items within the cache, but the JMX attribute jboss.datagrid-infinispan.distSyncCache.ContainerName.ClusterCacheStats.numberOfEntries shows a different number
• It is expected that the current cache size can monitored by using JMX attribute ClusterCacheStats.numberOfEntries but it does not show the correct number of entries
• If passivation is enabled the cache statistic provided by JMX shows incorrect numbers