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Andreas commented on SPARK-9746: -------------------------------- Sure I tried this with different inputs (driven by ScalaCheck). If V would have been arbitrary I wouldn't made up this issue. Youst try 'cntxt.parallelize(List (("a", 1), ("a", 2))).groupBy(_._1).countByKey()' and you will get count '1' instead of '2' (one key, two values) > PairRDDFunctions.countByKey: values/counts always 1 > --------------------------------------------------- > > Key: SPARK-9746 > URL: https://issues.apache.org/jira/browse/SPARK-9746 > Project: Spark > Issue Type: Bug > Components: Spark Core > Affects Versions: 1.4.0 > Reporter: Andreas > > org.apache.spark.rdd.PairRDDFunctionscountByKey(): Map[K, Long] = > self.withScope { > self.mapValues(_ => 1L).reduceByKey(_ + _).collect().toMap > } > obviously always returns count 1 for each key. > If I understand the docs correctly I would expect this implementation: > self.mapValues(_.size).reduceByKey(_ + _).collect().toMap -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org