I have the same problem, a uni-directional one to many on a FK with CascadeType ALL. I try to delete a parent entity A, and Hibernate tries to update the FK column on the child table B to null, rather than performing a delete. | DEBUG 21-12 10:51:52,375 (Log4JLogger.java:debug:84) -Deleting collection: [A.B#A = [3, TestDataFactory OrgName - EGYM]] | DEBUG 21-12 10:51:52,375 (Log4JLogger.java:debug:84) -about to open PreparedStatement (open PreparedStatements: 0, globally: 0) | DEBUG 21-12 10:51:52,375 (Log4JLogger.java:debug:84) -update B set msg_id=null where msg_id=? | Hibernate: update B set msg_id=null where msg_id=? | DEBUG 21-12 10:51:52,375 (Log4JLogger.java:debug:84) -done deleting collection | DEBUG 21-12 10:51:52,375 (Log4JLogger.java:debug:84) -Executing batch size: 1 | DEBUG 21-12 10:51:52,390 (Log4JLogger.java:debug:84) -about to close PreparedStatement (open PreparedStatements: 1, globally: 1) | DEBUG 21-12 10:51:52,390 (Log4JLogger.java:debug:84) -skipping aggressive-release due to flush cycle | DEBUG 21-12 10:51:52,390 (Log4JLogger.java:debug:89) -Could not execute JDBC batch update [update B set msg_id=null where msg_id=?] | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995481#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...