O erro ORA-31623 ocorre algumas vezes na hora de executar um expdp, isso ocorre devido o parametro streams_pool_size está com o valor 0
Vamos corrigir o problema.
[oraclezm@zmdb1~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Sun May 12 17:11:42 2019 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options SQL> show parameter stream NAME TYPE ------------------------------------ -------------------------------- VALUE ------------------------------ streams_pool_size big integer 0 SQL> alter system set streams_pool_size=64M scope=both; alter system set streams_pool_size=64M scope=both * ERROR at line 1: ORA-32001: write to SPFILE requested but no SPFILE is in use SQL> alter system set streams_pool_size=64M scope=memory; System altered. SQL>