Hi all, I am trying to get read-ahead working for my installation. First with on-find and later with on-load. I have read and read the documentation on this, put the loadgroups-statements on different places in the jbosscmp-jdbc descriptor, but JBOSS keeps complaining about a NullPointerException in getLoadGroupMask. My questions: 1. Does that mean that the eager-load-group basic is unknown? 2. If so, where should the loadgroups-statement be put so that in can be read? Putting a <eager-load-group>basic</eager-load-group> between and gives the message that eager-load-group basic is unknown. 3. Do you have any example complete jbosscmp-jdbc file which I could investigate? Any tip would be highly appreciated, part of the jbosscmp-jdbc is pasted below: I have tryed to paste part of the jbosscmp-jdbc.xml jar below. Unfortunately in the preview it seems to leave out some statements. Therefore I put comments in. ===============start=============================== <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE jbosscmp-jdbc PUBLIC "-/JBOSS//DTD JBOSSCMP-JDBC 3.2/EN" "file:/usr/jboss-3.2.3/docs/dtd/jbosscmp-jdbc_3_2.dtd"> <jbosscmp-jdbc> <!-- in the defaults section the datasource and the datasource-mapping are defined, no read-ahead statements or loadgroups --> <!-- the enterprise definition starts. There is no information between the defaults-section and the enterprise start --> <enterprise-beans> <!-- the entity start here --> <ejb-name>BoekingejbStemTutorEJB</ejb-name> <table-name>stemtutor_table</table-name> <cmp-field> <field-name>relation_key</field-name> <column-name>relation_key</column-name> </cmp-field> .... <cmp-field> <field-name>update_userid</field-name> <column-name>update_userid</column-name> </cmp-field> <!-- after all cmp-fields a loadgroups definition --> <load-group-name>basic</load-group-name> <field-name>stemkey</field-name> <field-name>tutorkey</field-name> <!-- after the loadgroups definition the queries --> <query-method> <method-name>findByCouncilnr</method-name> <method-params> <method-param>java.lang.String</method-param> </method-params> </query-method> <declared-sql> organisationnr={0} tutorkey </declared-sql> <query-method> <method-name>findByStemKey</method-name> <method-params> <method-param>java.lang.String</method-param> <method-param>java.lang.String</method-param> </method-params> </query-method> <declared-sql> organisationnr={0} and stem={1} tutorkey </declared-sql> <read-ahead> on-find <page-size>150</page-size> <eager-load-group>basic</eager-load-group> </read-ahead> </enterprise-beans> </jbosscmp-jdbc> ====================end======================== View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4111481#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...