有锁，别人占用了，等他提交或者回滚，或者找出来 杀掉他。用下面语句查查看。

select s.SID,s.SERIAL#,s.MACHINE,s.TYPE,l.TYPE,l.CTIME,l.BLOCK,l.REQUEST,l.LMODE,
       decode(l.lmode,
              0,
              'None',
              1,
              'Null',
              2,
              'Row-S (SS)',
              3,
              'Row-X (SX)',
              4,
              'Share',
              5,
              'S/Row-X (SSX)',
              6,
              'Exclusive',
              substr(to_char(l.lmode), 1, 13)) as "Locked Mode",
       DECODE(L.TYPE,
              'MR',
              'File_ID:' || L.ID1,
              'TM',
              t.NAME,
              'TX',
              'USN:' || to_char(TRUNC(L.ID1 / 65536)) || 'RWO:' ||
              nvl(r.NAME, 'None'),
              L.ID1) as LOCK_ID1,
       'alter system kill session ''' || s.SID || ',' || s.SERIAL# || ''';' as "Kill"
  from v$process p
 inner join v$session s
    on s.PADDR = p.ADDR
 inner join v$lock l
    on l.SID = s.SID
  left join sys.obj$ t
    on l.ID1 = t.obj#
  left join sys.obj$ r
    on s.ROW_WAIT_OBJ# = r.obj#
 where 1 = 1
   and l.TYPE != 'MR' 
-- and l.TYPE  = 'TM'
   and l.lmode = 3
 order by s.SID;