Hi I'm encountering the following with our app running on JBoss 3.2.6 on Linux. I've found what seem to be related topics on this but they said that those issues were resolved in an older JBoss release: First I get several of each of these: WARN [Thread-7] org.jboss.ejb.plugins.AbstractInstanceCache:tryToPassivate:163 - Unable to passivate due to ctx lock, id=com.company.ejb.entity.ChildOldEntityPK@1f61b1 WARN [Thread-7] org.jboss.ejb.plugins.AbstractInstanceCache:tryToPassivate:163 - Unable to passivate due to ctx lock, id=com.company.ejb.entity.OtherEntityPK@1f0faa WARN [Thread-7] org.jboss.ejb.plugins.AbstractInstanceCache:tryToPassivate:163 - Unable to passivate due to ctx lock, id=com.company.ejb.entity.ChildNewEntityPK@202263 WARN [Thread-7] org.jboss.ejb.plugins.AbstractInstanceCache:tryToPassivate:163 - Unable to passivate due to ctx lock, id=com.company.ejb.entity.ParentNewEntityPK@1f61b0 WARN [Thread-7] org.jboss.ejb.plugins.AbstractInstanceCache:tryToPassivate:163 - Unable to passivate due to ctx lock, id=com.company.ejb.entity.ParentOldEntityPK@1f61a9 Then eventually, an exception is thrown: ERROR [JMS SessionPool Worker-0] org.jboss.ejb.plugins.LogInterceptor:handleException:294 - TransactionRolledbackLocalException in method: public abstract void com.company.ejb.session.BatchSessionLocal.postBatchTxnWrapper(int,int,java.lang.String) throws com.company.common.exception.BatchException, causedBy: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl [FormatId=257, GlobalId=tjboss3//251, BranchQual=] status=STATUS_NO_TRANSACTION at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:415) at org.jboss.ejb.plugins.TxInterceptorCMT.endTransaction(TxInterceptorCMT.java:456) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:369) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:148) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:111) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191) at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:331) at org.jboss.ejb.Container.invoke(Container.java:709) at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:419) at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:83) at $Proxy328.postCashReceiptBatchTxnWrapper(Unknown Source) at com.company.ejb.session.BatchSessionBean.doPostBatch(BatchSessionBean.java:723) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:683) at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:72) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:282) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:148) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:111) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191) at org.jboss.ejb.StatelessSessionContainer.internalInvoke(StatelessSessionContainer.java:331) at org.jboss.ejb.Container.invoke(Container.java:709) at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:419) at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:83) at $Proxy325.doPostBatch(Unknown Source) at com.company.ejb.mdb.BatchProcessorBean.onMessage(BatchProcessorBean.java:97) ... ... Here is the Algorithm. It is run from a SLSB called from a MDB. ParentOldEntity - has many ChildOldEntity - will have corresponding ParentNewEntity ChildOldEntity - has corresponding OtherEntity - will have corresponding ChildNewEntity ParentNewEntity ChildNewEntity OtherEntity do a findBy on ParentOldEntity | Iterate ParentOldEntities | update ParentOldEntity | create ParentNewEntity | do a findBy on ChildOldEntity | Iterate ChildOldEntities | update ChildOldEntity | create ChildNewEntity | collect RelatedEntity key from ChildNewEntity | END | Iterate collected OtherEntity keys | do a findBy on OtherEntity with key | update OtherEntity | END | END In our tests, failures seem to depend on the number of ChildOldEntity/OtherEntity. REAL SERVER usually 1000 ParentOldEntity will not fail up to around 15000 ChildOldEntity/OtherEntity VM SERVER usually 1000 ParentOldEntity will not fail up to around 4000 ChildOldEntity/OtherEntity This is our BMP EntityBean configuration. <container-configuration> | <container-name>Standard BMP EntityBean</container-name> | <call-logging>false</call-logging> | <container-invoker>org.jboss.proxy.ejb.ProxyFactory</container-invoker> | <container-interceptors> | <interceptor>org.jboss.ejb.plugins.LogInterceptor</interceptor> | <interceptor>org.jboss.ejb.plugins.SecurityInterceptor</interceptor> | <interceptor>org.jboss.ejb.plugins.TxInterceptorCMT</interceptor> | <interceptor metricsEnabled="true">org.jboss.ejb.plugins.MetricsInterceptor</interceptor> | <interceptor>org.jboss.ejb.plugins.EntityInstanceInterceptor</interceptor> | <interceptor>org.jboss.ejb.plugins.EntitySynchronizationInterceptor</interceptor> | </container-interceptors> | <instance-pool>org.jboss.ejb.plugins.EntityInstancePool</instance-pool> | <instance-cache>org.jboss.ejb.plugins.EntityInstanceCache</instance-cache> | <persistence-manager>org.jboss.ejb.plugins.BMPPersistenceManager</persistence-manager> | <transaction-manager>org.jboss.tm.TxManager</transaction-manager> | <container-invoker-conf> | <RMIObjectPort>4444</RMIObjectPort> | <Optimized>True</Optimized> | </container-invoker-conf> | <container-cache-conf> | <cache-policy>org.jboss.ejb.plugins.LRUEnterpriseContextCachePolicy</cache-policy> | <cache-policy-conf> | <min-capacity>50</min-capacity> | <max-capacity>25000</max-capacity> | <overager-period>300</overager-period> | <max-bean-age>600</max-bean-age> | <resizer-period>400</resizer-period> | <max-cache-miss-period>60</max-cache-miss-period> | <min-cache-miss-period>1</min-cache-miss-period> | <cache-load-factor>0.75</cache-load-factor> | </cache-policy-conf> | </container-cache-conf> | <container-pool-conf> | <MaximumSize>100</MaximumSize> | <MinimumSize>10</MinimumSize> | </container-pool-conf> | <commit-option>C</commit-option> | </container-configuration> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4138812#... 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