Thank you for you help,kukeltje. Yes ,When the task instance is ended,the timer will be delete automiclly, So I try to delete the time directly from table jbpm_timer by invoke "deleteTimer(findTimersByName(...))", but a hibernate update exception will be throw,could you prompt me something? :) thank you again, Thanx & regard Sweet. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4254872#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...