Nitpick. Starting a sentence with "because" is often frowned upon by grammer nazis. Better start with "As..." 
Also, maybe clarify this lineage thing further. Something like.
"Recollect that each RDD remembers the set of operations used to create it, which is called it lineage. For RDD created by stateful operations depend on RDDs across batches, their lineage can grow really large. Hence it necessary to periodically checkpointed the RDDs in such DStreams to safely truncate the lineage of operations it has to remember."