i have found a problem. hibernate entity manager 3.4.0 use slf4j as logger (that was new for me). My project is maven driven, so i have only a hibernate-entitymanager dependency. maven returns a slf4j-api.jar but not a log4j adapter for slf. It must be done explicitly with dependency slf4j-log4j12. Also it is important to get the right version. Hibernate use slf4j 1.4.2 so the log4j adapter must also be in this vesion. So, now i have slf4j-api and log4j adapter in the classpath and my log4j configuration will be used correctly. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4221339#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...