ORA-04021: timeout occurred while waiting to lock object

ora-04021: timeout occurred while waiting to lock object

某个应用正在锁定该表或者包
表为
select b.sid,b.serial#,c.sql_text
from v$locked_object a, v$session b, v$sqlarea c
where a.session_id = b.sid
and b.sql_address = c.address
and c.sql_text like '%table_name%';
包为
select b.sid,b.username,b.machine from v$access a, v$session b where a.sid=b.sid and a.object = '％package_name％' and a.type = 'package';
找出这个session
然后 kill
alter system kill session 'sid,serial#';