ora-00054:resource busy and acquire with nowait specified

1.查到SID.SELECT  SESSION_ID   FROM   V$LOCKED_OBJECT,USER_OBJECTS  WHERE   V$LOCKED_OBJECT.OBJECT_ID=USER_OBJECTS.OBJECT_ID ;

2.查到SERIAL#.SELECT SERIAL# FROM V$SESSION  WHERE SID=‘SESSION_ID’ ，

3.alter system kill session 'sid,SERIAL#'

报错：ERROR at line 1:
ORA-00031: session marked for kill
4.select spid, osuser, s.program from v$session s,v$process p where s.paddr=p.addr and s.sid=24

切换ROOT用户

kill -9 spid

但错误仍然有。

结果是有个JOB在执行。