用expdp 导出数据库，报错，意外中断：
ORA-39125: Worker unexpected fatal error in KUPW$WORKER.UNLOAD_METADATA while calling DBMS_METADATA.FETCH_XML_CLOB[PROCACT_SCHEMA:"GGS"]
ORA-04063: view"SYS.KU$_CLUSTER_VIEW" has errors
ORA-06512: at"SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.KUPW$WORKER",line 6234
----- PL/SQL Call Stack -----
object line object
handle number name
c00000014c508d08 14916 package body SYS.KUPW$WORKER
c00000014c508d08 6293 package body SYS.KUPW$WORKER
c00000014c508d08 2339 package body SYS.KUPW$WORKER
c00000014c508d08 6854 package body SYS.KUPW$WORKER
c00000014c508d08 1259 package body SYS.KUPnW$WORKER
c000000211983d20 2 anonymous block
Job"SYS"."SYS_EXPORT_FULL_05" stopped due to fatal error at09:09:55
In this case theproblem is generated because the view SYS.KU$_CLUSTER_VIEW is invalid, inaddition to that the following components are invalids according with theoutput of dba_registry.
--导致这个现象的原因是因为SYS.KU$_CLUSTER_VIEW视图无效。
同时也可能存在一些组件的无效，可以使用如下SQL 查询：
col comp_id for a12;
col comp_name for a30;
col version for a12;
select comp_id, comp_name, version, status from dba_registry;
OWM Oracle WorkspaceManager 10.2.0.4.3 VALID
ORDIM OracleinterMedia 10.2.0.4.0 INVALID
CATALOG Oracle Database Catalog Views 10.2.0.4.0INVALID
CATPROC Oracle Database Packages and Types 10.2.0.4.0 INVALID
解决方法：
cd $ORACLE_HOME/rdbms/admin
SQL> startup restrict
SQL> select count(*) from dba_objects where status='INVALID';
SQL> @catalog
SQL> @catproc
SQL> @utlrp <== To compile the invalid objects
SQL> select count(*) from dba_objects where status='INVALID';
col comp_id for a12
col comp_name for a30
col version for a12
select comp_id, comp_name, version, status from dba_registry;
SQL> shutdown immediate
SQL> startup
通过执行catalog.sql 脚本刷新视图，CATALOG.SQL 文件包含这些视图的定义以及公用同义词，运行CATALOG.SQL 可以创建这些视图及同义词。来解决视图失效的问题。
执行完毕验证无效对象和组件，如果正常就可以继续expdp了。
相关的链接：
ORA-39125 ORA-4063 on ViewSYS.KU$_CLUSTER_VIEW When Doing a DataPump Export [ID 742018.1]
exp/imp 与expdp/impdp 对比 及使用中的一些优化事项
http://blog.csdn.net/tianlesoftware/article/details/6093973
http://blog.csdn.net/tianlesoftware/article/details/6260138
Oracle 10gData Pump Expdp/Impdp 详解
http://blog.csdn.net/tianlesoftware/article/details/4674224
http://blog.csdn.net/tianlesoftware/article/details/5863191
http://blog.csdn.net/tianlesoftware/article/details/4843600
Oracle8i/9i/10g/11g 组件（Components） 说明
http://blog.csdn.net/tianlesoftware/article/details/5937382
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