Merge two RDDs in Spark Scala

Question

I have two RDDs.

rdd1 = (String, String)

key1, value11
key2, value12
key3, value13

rdd2 = (String, String)

key2, value2         


        

Answer 1

I think this may be what you are looking for:

join(otherDataset, [numTasks])  

When called on datasets of type (K, V) and (K, W), returns a dataset of (K, (V, W)) pairs with all pairs of elements for each key. Outer joins are supported through leftOuterJoin, rightOuterJoin, and fullOuterJoin.

See the associated section of the docs