ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired

由于表删除了分区，导致索引失效，重建索引过程中出现ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired报错

SQL> ALTER INDEX RELATE.PK_RELATE_RECEIVE_LOG REBUILD;
ALTER INDEX RELATE.PK_RELATE_RECEIVE_LOG REBUILD
                   *
ERROR at line 1:
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired

由报错得知，资源被占用处于忙碌状态，无法创建索引。
先查询该索引属于哪个表：

SQL> select owner,index_name,table_owner,table_name from dba_indexes where index_name='PK_RELATE_RECEIVE_LOG';

OWNER
--------------------------------------------------------------------------------------------------------------------------------
INDEX_NAME
--------------------------------------------------------------------------------------------------------------------------------
TABLE_OWNER
--------------------------------------------------------------------------------------------------------------------------------
TABLE_NAME
--------------------------------------------------------------------------------------------------------------------------------
RELATE
PK_RELATE_RECEIVE_LOG
RELATE
RELATE_RECEIVE_LOG

该索引位于RELTE.RELATE_RECEIVE_LOG表上。
查询哪个会话占用了RELATE.RELATE_RECEIVE_LOG表：

SQL> select l.session_id,o.owner,o.object_name 
  2  from v$locked_object l,dba_objects o 
  3  where l.object_id=o.object_id AND OBJECT_NAME='RELATE_RECEIVE_LOG';

SESSION_ID
----------
OWNER
--------------------------------------------------------------------------------
OBJECT_NAME
--------------------------------------------------------------------------------
      7746
RELATE
RELATE_RECEIVE_LOG

session id为7746占用了该表，可通过alter system kill session在数据库层面杀除该会话，也可通过OS层面KILL OSPID的方法，此次处理过程中采用后者，释放资源更快：

SQL> select  b.spid,a.sid,a.username,a.program,a.machine,BLOCKING_SESSION from v$session a,v$process b where a.paddr=b.addr  and a.sid=7746;

SPID                            SID
------------------------ ----------
USERNAME
--------------------------------------------------------------------------------
PROGRAM
------------------------------------------------
MACHINE
----------------------------------------------------------------
BLOCKING_SESSION
----------------
22448                          7746
RELATE
JDBC Thin Client

SPID                            SID
------------------------ ----------
USERNAME
--------------------------------------------------------------------------------
PROGRAM
------------------------------------------------
MACHINE
----------------------------------------------------------------
BLOCKING_SESSION
----------------
jdbcclient



SQL> !ps -ef | grep 22448
oracle   22448     1  9 Feb01 ?        16-18:35:55 oracleeifdb2 (LOCAL=NO)
oracle   68252 67718  0 11:40 pts/1    00:00:00 /bin/bash -c ps -ef | grep 22448
oracle   68255 68252  0 11:40 pts/1    00:00:00 grep 22448

SQL> !kill -9 22448

SQL> !ps -ef | grep 22448
oracle    1341 67718  0 11:48 pts/1    00:00:00 /bin/bash -c ps -ef | grep 22448
oracle    1343  1341  0 11:48 pts/1    00:00:00 grep 22448

再次执行索引重建：

SQL> ALTER INDEX RELATE.PK_RELATE_RECEIVE_LOG REBUILD;

Index altered.

SQL>