How executor Understand which RDDs needed to be persist from the submitted Task

[Jack Kolokasis]

Hello all,

I want to find when a Task that is sended by Driver to executor contains 
a call to function persist(). I am trying to read the submitted function 
that driver send to executor but I could not find any call to persist() 
method. Do you know how executor understand which RDDs needed to be persist?

Thanks,
Iacovos Kolokasis

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