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Posted to user@spark.apache.org by qiaou <qi...@gmail.com> on 2014/11/12 07:31:13 UTC

How did the RDD.union work

Hi：  
    I got a problem with using the union method of RDD
    things like this
I get a function like
def hbaseQuery(area:string):RDD[Result]= ???
        when i use hbaseQuery('aa').union(hbaseQuery(‘bb’)).count() it returns 0
however when use like this  sc.parallize(hbaseQuery('aa’).collect.toList ::: hbaseQuery(’bb’).collect.toList) it return the right value  
obviously i have got an action after my transformation action ,but why it did not work
fyi

--  
qiaou
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