Ok sorry, I forgot some informations about the environment: JBoss-4.0.5.GA ejb3-install (ejb3, Hibernate-3.2.0.GA, JBossCache 1.4.0.SP1) The persisitence unit: | <persistence> | | <persistence-unit name="pistats"> | <jta-data-source>java:/pistats-ds</jta-data-source> | <properties> | <property name="hibernate.dialect" | value="org.hibernate.dialect.DerbyDialect" /> | <property name="hibernate.hbm2ddl.auto" value="none" /> | <property name="hibernate.generate_statistics" value="true" /> | <property name="hibernate.cache.use_structured_entries" value="false" /> | <property name="hibernate.cache.provider_class" value="org.jboss.ejb3.entity.TreeCacheProviderHook"/> | | <property name="hibernate.treecache.mbean.object_name" value="pistats.db:service=StockEntityCache"/> | <property name="hibernate.cache.use_query_cache" value="true"/> | </properties> | | </persistence-unit> | | </persistence> | Cache config: | <mbean code="org.jboss.cache.TreeCache" | name="pistats.db:service=StockEntityCache"> | <depends>jboss:service=Naming</depends> | <depends>jboss:service=TransactionManager</depends> | | <attribute name="TransactionManagerLookupClass"> | org.jboss.cache.JBossTransactionManagerLookup | </attribute> | | <attribute name="IsolationLevel">REPEATABLE_READ</attribute> | | <attribute name="NodeLockingScheme">PESSIMISTIC</attribute> | | <attribute name="CacheMode">LOCAL</attribute> | | <attribute name="LockAcquisitionTimeout">30000</attribute> | | <attribute name="EvictionPolicyClass"> | org.jboss.cache.eviction.LRUPolicy | </attribute> | | <attribute name="EvictionPolicyConfig"> | <config> | <attribute name="wakeUpIntervalSeconds">5</attribute> | <region name="/_default_" | policyClass="org.jboss.cache.eviction.LRUPolicy"> | <attribute name="maxNodes">1000</attribute> | <attribute name="timeToLiveSeconds">1800</attribute> | <attribute name="maxAgeSeconds">3600</attribute> | </region> | <region name="/stockdata" | policyClass="org.jboss.cache.eviction.LRUPolicy"> | <attribute name="maxNodes">10000</attribute> | <attribute name="timeToLiveSeconds">3600</attribute> | <attribute name="maxAgeSeconds">3600</attribute> | </region> | </config> | </attribute> | | </mbean> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982391#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...