Oracle 12c introduced a new concept of a pluggable database. It comes with many interesting features as well as some nuances that we need to know to perform such tasks as data pump export and import.
The main surprise comes with an undocumented fact that Oracle’s default Data Pump directory object, DATA_PUMP_DIR, cannot be used for data pump export and import.
When you try to attempt running expdp or impdp utilities using DIRECTORY=DATA_PUMP_DIR, you should get the following error message:
ORA-39002: invalid operation ORA-39070: Unable to open the log file. ORA-39087: directory name DATA_PUMP_DIR is invalid
The solution is quite straightforward: do not use DATA_PUMP_DIR directory object for pluggable db.
You can create a new directory object (as a SYS user or as a user with CREATE ANY DIRECTORY privilege granted), grant READ and WRITE privileges on that DIRECTORY, and perform data pump export/import tasks.