Ronald, We use transaction level Read-committed as adviced in the documentation. <local-tx-datasource> | <jndi-name>JbpmDS</jndi-name> | <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation> | | We also tried an XA datasource but that gave the same result. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4196528#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...