I was successfully able to export schema using exp command, for some reason expdp hangs, I have 3000 objects in that schema, expdp hangs after exporting 2960 objects and it hangs at table which has 250 million records.
The oracle version is

I have tried several times, using different parameters of expdp. Also it doesn't show starter jobs more than one, for parallel=4.

Please help!!!!