Pretty sure there's an error in BaseWrapperManagedConnection.cleanup: | if (jdbcTransactionIsolation != transactionIsolation) | { | try | { | con.setTransactionIsolation(jdbcTransactionIsolation); | jdbcTransactionIsolation = transactionIsolation; | } | catch (SQLException e) | { | mcf.log.warn("Error resetting transaction isolation ", e); | } | } | Surely the first statement in the try-block should be con.setTransactionIsolation(transactionIsolation);? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4236986#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...