it looks like the postgres sequence returned 1. But the SequenceHiLoGenerated inserted a value of 50. I guess, it's because initialValue - default - 1 and allocationSize - 50. I have test table along with cabin table and this test table (you know, to test connections in pool) receives the first allocation block - 1 to 49. Cabin receives next 50 @Target({TYPE, METHOD, FIELD}) @Retention(RUNTIME) | public @interface SequenceGenerator { | String name(); | String sequenceName() default ""; | int initialValue() default 1; | int allocationSize() default 50; | } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3961430#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...