麻烦老师们帮忙指导下，非常感谢！

环境　：redhat6.4 x86_64　+　oracle11.2.0.4.0

导出命令：expdp user/passwd directory=bak dumpfile=111.dmp logfile=111.log content=metadata_only exclude=statistics

报错日志：

Export: Release 11.2.0.4.0 - Production on Thu Jun 13 09:50:38 2019

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

;;;

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, Automatic Storage Management, OLAP, Data Mining

and Real Application Testing options

Starting "NOAP"."SYS_EXPORT_SCHEMA_01":  user/******** DIRECTORY=bak CONTENT=METADATA_ONLY DUMPFILE=111.dmp logfile=111.log exclude=STATISTICS

Processing object type SCHEMA_EXPORT/USER

Processing object type SCHEMA_EXPORT/SYSTEM_GRANT

Processing object type SCHEMA_EXPORT/ROLE_GRANT

Processing object type SCHEMA_EXPORT/DEFAULT_ROLE

Processing object type SCHEMA_EXPORT/PASSWORD_HISTORY

Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA

Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE

Processing object type SCHEMA_EXPORT/TABLE/TABLE

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.FETCH_XML_OBJECTS [TABLE:"USER"."TABLE_TEST"]

ORA-06531: Reference to uninitialized collection

ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95

ORA-06512: at "SYS.KUPW$WORKER", line 9715

----- PL/SQL Call Stack -----

  object      line  object

  handle    number  name

0x104c9d6f60     21979  package body SYS.KUPW$WORKER

0x104c9d6f60      9742  package body SYS.KUPW$WORKER

0x104c9d6f60     11838  package body SYS.KUPW$WORKER

0x104c9d6f60      2808  package body SYS.KUPW$WORKER

0x104c9d6f60     10422  package body SYS.KUPW$WORKER

0x104c9d6f60      1824  package body SYS.KUPW$WORKER

0x104eb5af50         2  anonymous block

Job "NOAP"."SYS_EXPORT_SCHEMA_01" stopped due to fatal error at Fri Jun 14 01:09:42 2019 elapsed 0 15:18:43