如何根据一个基于另一个RDD的函数来过滤RDD ?

I am a beginner of Apache Spark. I want to filter out all groups whose sum of weight is larger than a constant value in a RDD. The "weight" map is also a RDD. Here is a small-size demo, the groups to be filtered is stored in "groups", the constant value is 12:I am a beginner of Apache Spark. I want to filt