How to stop/kill expdp/impdp processes

Here is shown how to kill/stop expdp/impdp processes.
Sometimes it's really need to killing expdp or impdp processes because wrong import or export, or heavy load on database or many other situation.
1) you need to identify job name, which you can view in data dictionary views:

select * from USER_DATAPUMP_JOBS;
select * from DBA_DATAPUMP_SESSIONS;

2) you need to attach that job find in above views:

impdp system/***** attach=test_dump(job_name)

3) stop job with command:

STOP_JOB=IMMEDIATE

That's all.