rhh777 commented on issue #154:
URL:
https://github.com/apache/incubator-uniffle/issues/154#issuecomment-1312449433
When the RDD is Empty, the shuffle is triggered and the **Empty assignment
to Shuffle Server**
val conf = new SparkConf()
conf.set("spark.shuffle.manager","org.apache.spark.shuffle.RssShuffleManager")
conf.set("spark.rss.coordinator.quorum","localhost:19999")
conf.set("spark.rss.storage.type","MEMORY_LOCALFILE")
val session: SparkSession = SparkSession.builder().config(conf).
master("local").appName("rss_empty_assignment").getOrCreate()
val rdd: RDD[Row] = session.emptyDataFrame.rdd
val inputRDD: RDD[(String, Int)] = rdd.map((row: Row) => {
("rss_empty_assignment", 1)
})
inputRDD.countByKey().foreach(println)
session.stop()
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