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expdp 导出报如下错误：
[oracle@dg1 ~]$ expdp directory=backup dumpfile=user.dmplogfile=user.log schemas=dave
Export: Release 11.2.0.3.0 - Production onThu Aug 28 00:28:34 2014
Copyright (c) 1982, 2011, Oracle and/or itsaffiliates. All rights reserved.
Username: / as sysdba
Connected to: Oracle Database 11gEnterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Miningand Real Application Testing options
ORA-31626: job does not exist
ORA-31638: cannot attach to jobSYS_EXPORT_SCHEMA_01 for user SYS
ORA-06512: at"SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPV$FT_INT",line 428
ORA-39077: unable to subscribe agentKUPC$A_1_002838232151000 to queue "KUPC$C_1_20140828002837"
ORA-06512: at"SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPC$QUE_INT",line 250
ORA-25448: ruleSYS.KUPC$C_1_20140828002837$5 has errors
ORA-00376: file 2 cannot be read at thistime
ORA-01110: data file 2: '/u01/app/oracle/oradata/dave/sysaux01.dbf'
--查看数据文件状态：
SQL> col file_name for a50
SQL> select file_name,status fromdba_data_files;
FILE_NAME STATUS
-----------------------------------------------------------
/u01/app/oracle/oradata/dave/users01.dbf AVAILABLE
/u01/app/oracle/oradata/dave/undotbs01.dbf AVAILABLE
/u01/app/oracle/oradata/dave/sysaux01.dbf AVAILABLE
/u01/app/oracle/oradata/dave/system01.dbf AVAILABLE
/u01/dave01.dbf AVAILABLE
/u01/dropspace02.dbf AVAILABLE
/u01/dropspace03.dbf AVAILABLE
/u01/dropspace04.dbf AVAILABLE
/u01/fsf01.dbf AVAILABLE
/u01/dropspace01.dbf AVAILABLE
10 rows selected.
toad 中也无法查看表空间，用sys用户连接的，权限不可能不够：
查看数据库状态：
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE
alert log 也没有错误。
开始重点放在如下部分：
ORA-31638: cannot attach to jobSYS_EXPORT_SCHEMA_01 for user SYS
ORA-06512: at"SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPV$FT_INT",line 428
ORA-39077: unable to subscribe agentKUPC$A_1_002838232151000 to queue "KUPC$C_1_20140828002837"
ORA-06512: at"SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPC$QUE_INT",line 250
ORA-25448: ruleSYS.KUPC$C_1_20140828002837$5 has errors
结果还是数据文件的问题， sysaux01.dbf 是offline的。 这个环境之前做过很多测试，也不清楚哪次给弄成offline了。
SQL> select file_name,online_status fromdba_data_files;
FILE_NAME ONLINE_
---------------------------------------------------------
/u01/app/oracle/oradata/dave/users01.dbf ONLINE
/u01/app/oracle/oradata/dave/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/dave/sysaux01.dbf OFFLINE
/u01/app/oracle/oradata/dave/system01.dbf SYSTEM
/u01/dave01.dbf ONLINE
/u01/dropspace02.dbf RECOVER
/u01/dropspace03.dbf RECOVER
/u01/dropspace04.dbf RECOVER
/u01/fsf01.dbf ONLINE
/u01/dropspace01.dbf OFFLINE
10 rows selected.
online 之后，恢复正常：
SQL> alter database datafile'/u01/app/oracle/oradata/dave/sysaux01.dbf' online;
Database altered.
SQL> select file_name,online_status fromdba_data_files;
FILE_NAME ONLINE_
---------------------------------------------------------
/u01/app/oracle/oradata/dave/users01.dbf ONLINE
/u01/app/oracle/oradata/dave/undotbs01.dbf ONLINE
/u01/app/oracle/oradata/dave/sysaux01.dbf ONLINE
/u01/app/oracle/oradata/dave/system01.dbf SYSTEM
/u01/dave01.dbf ONLINE
/u01/dropspace02.dbf RECOVER
/u01/dropspace03.dbf RECOVER
/u01/dropspace04.dbf RECOVER
/u01/fsf01.dbf ONLINE
/u01/dropspace01.dbf OFFLINE
10 rows selected.
Toad 也正常：
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