Hello Mark and weston, First of all, thanks for your help - i really don't know what to do because this code is running without problem on Glassfish . Mark, I don't see anywhere in my trace that a transaction was previously marked as ROLLBACK-ONLY. When the error occurs, the transaction is rollbacked ( you can see this in my trace ) but before ... i saw nothing on this, neverthess ilooked for this in the whole trace and i have the maximum trace level set in jbossjta-properties.xml : How can i see that the transaction was previously marked as rollback ? Weston, do we still speak of JBossTS - i believed JTA/Arjuna was new in 4.2.x ? I don't see how to activate TRACE on JCA in my jboss-log4j.xml - nothing to uncomment ? Here is my DS configuration file : --------------------------------------------------- <local-tx-datasource> <jndi-name>jdbc/otainfra-ds</jndi-name> <use-java-context>false</use-java-context> <connection-url>jdbc:oracle:thin:@londres:1521:MMSERVER</connection-url> <driver-class>oracle.jdbc.driver.OracleDriver</driver-class> <user-name>demo</user-name> demo <type-mapping>Oracle9i</type-mapping> </local-tx-datasource> ------------------------------------------------------------------------- Thx, Olivier View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030228#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...