Yang Yang created SPARK-18189:
---------------------------------
Summary: task not serializable with groupByKey() + mapGroups() +
map
Key: SPARK-18189
URL: https://issues.apache.org/jira/browse/SPARK-18189
Project: Spark
Issue Type: Bug
Reporter: Yang Yang
just run the following code
val a = spark.createDataFrame(sc.parallelize(Seq((1,2),(3,4)))).as[(Int,Int)]
val grouped = a.groupByKey({x:(Int,Int)=>x._1})
val mappedGroups = grouped.mapGroups((k,x)=>{(k,1)})
val yyy = sc.broadcast(1)
val last = mappedGroups.rdd.map(xx=>{
val simpley = yyy.value
1
})
spark says Task not serializable
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