看了下Error ORA-39078 Received During DataPump Export (文档 ID 376022.1)

看看streams_pool_size的值，

show parameter streams_pool_size

select * from v$sga_dynamic_components where component='streams pool';

数据泵使用streams来生成导出，如果太小则会报此错误。

connect / as sysdba
alter system set STREAMS_POOL_SIZE=100M scope=spfile;

shutdown
startup