Hi Jon, I understand this is not a standard RA deployment anymore but rather a TomEE specific way. Anyway, I had a try and it works like a charm! Now, I can have this nice and clean resources.xml embedded in my EAR: threadPoolSize=7 resourceAdapter=MyResourceAdapter transactionSupport=none serverName=server001 pooling=true poolMaxSize=3 poolMinSize=0 connectionMaxWaitTime=3 seconds connectionMaxIdleTime=5 seconds resourceAdapter=MyResourceAdapter transactionSupport=none serverName=server002 pooling=true poolMaxSize=2 poolMinSize=1 connectionMaxWaitTime=5 seconds connectionMaxIdleTime=10 seconds No more "hack" in system.properties! As you said, it would be a cool feature to have this resources.xml support for RARs. Thanks for your help! Regards, Jean. -- Sent from: http://tomee-openejb.979440.n4.nabble.com/TomEE-Users-f979441.html