找出数据库的serial#,以备杀死：
select t2.username,t2.sid,t2.serial#,t2.logon_time from v$locked_object t1,v$session t2 where t1.session_id=t2.sid order by t2.logon_time;
杀死该session
alter system kill session ‘sid,serial#‘
原文：http://www.cnblogs.com/bingxueme/p/4563988.html