[jira] [Created] (SPARK-28913) CLONE - ArrayIndexOutOfBoundsException in ALS for Large datasets

["Qiang Wang (Jira)" <ji...@apache.org>]

Qiang Wang created SPARK-28913:
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             Summary: CLONE - ArrayIndexOutOfBoundsException in ALS for Large datasets
                 Key: SPARK-28913
                 URL: https://issues.apache.org/jira/browse/SPARK-28913
             Project: Spark
          Issue Type: Bug
          Components: MLlib
    Affects Versions: 1.1.0, 1.2.0
            Reporter: Qiang Wang
            Assignee: Xiangrui Meng


The stack trace is below:

{quote}
java.lang.ArrayIndexOutOfBoundsException: 2716
        org.apache.spark.mllib.recommendation.ALS$$anonfun$org$apache$spark$mllib$recommendation$ALS$$updateBlock$1.apply$mcVI$sp(ALS.scala:543)
        scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)
        org.apache.spark.mllib.recommendation.ALS.org$apache$spark$mllib$recommendation$ALS$$updateBlock(ALS.scala:537)
        org.apache.spark.mllib.recommendation.ALS$$anonfun$org$apache$spark$mllib$recommendation$ALS$$updateFeatures$2.apply(ALS.scala:505)
        org.apache.spark.mllib.recommendation.ALS$$anonfun$org$apache$spark$mllib$recommendation$ALS$$updateFeatures$2.apply(ALS.scala:504)
        org.apache.spark.rdd.MappedValuesRDD$$anonfun$compute$1.apply(MappedValuesRDD.scala:31)
        org.apache.spark.rdd.MappedValuesRDD$$anonfun$compute$1.apply(MappedValuesRDD.scala:31)
        scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
        scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
        org.apache.spark.util.collection.ExternalAppendOnlyMap.insertAll(ExternalAppendOnlyMap.scala:138)
        org.apache.spark.rdd.CoGroupedRDD$$anonfun$compute$5.apply(CoGroupedRDD.scala:159)
        org.apache.spark.rdd.CoGroupedRDD$$anonfun$compute$5.apply(CoGroupedRDD.scala:158)
        scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
        scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
        scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
        scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
        org.apache.spark.rdd.CoGroupedRDD.compute(CoGroupedRDD.scala:158)
        org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
        org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
        org.apache.spark.rdd.MappedValuesRDD.compute(MappedValuesRDD.scala:31)
        org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
        org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
        org.apache.spark.rdd.FlatMappedValuesRDD.compute(FlatMappedValuesRDD.scala:31)
        org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
        org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
        org.apache.spark.rdd.FlatMappedRDD.compute(FlatMappedRDD.scala:33)
        org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
        org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
{quote}
This happened after the dataset was sub-sampled. 
Dataset properties: ~12B ratings
Setup: 55 r3.8xlarge ec2 instances



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