我从这样一个文件中读到：

val ratingText = sc.textFile("/home/cloudera/rec_data/processed_data/ratings/000000_0")

使用以下函数分析此数据：

def parseRating(str: String): Rating= {
      val fields = str.split(",")
      Rating(fields(0).toInt, fields(1).trim.toInt, fields(2).trim.toDouble)
}

并创建了一个rdd，然后将其拆分为不同的rdd

val ratingsRDD = ratingText.map(x=>parseRating(x)).cache()

val splits = ratingsRDD.randomSplit(Array(0.8, 0.2), 0L)

val trainingRatingsRDD = splits(0).cache()

使用培训rdd创建模型，如下所示：

val model = (new ALS().setRank(20).setIterations(10) .run(trainingRatingsRDD))

我在最后一个命令中得到以下错误

16/10/28 01:03:44 WARN BLAS: Failed to load implementation from: com.github.fommil.netlib.NativeSystemBLAS
16/10/28 01:03:44 WARN BLAS: Failed to load implementation from: com.github.fommil.netlib.NativeRefBLAS
16/10/28 01:03:46 WARN LAPACK: Failed to load implementation from: com.github.fommil.netlib.NativeSystemLAPACK
16/10/28 01:03:46 WARN LAPACK: Failed to load implementation from: com.github.fommil.netlib.NativeRefLAPACK

编辑：t。加韦达的建议有助于消除错误，但我仍得到以下警告：

16/10/28 01:53:59 WARN Executor: 1 block locks were not released by TID = 60:
[rdd_420_0]
16/10/28 01:54:00 WARN Executor: 1 block locks were not released by TID = 61:
[rdd_421_0]

我认为这导致了一个空模型，因为下一步将导致以下错误：
val toprecsforuser=型号.推荐产品（4276736,3）
错误是：

java.util.NoSuchElementException: next on empty iterator at scala.collection.Iterator$$anon$2.next(Iterator.scala:39)

请帮帮我！