[jira] [Created] (SPARK-8200) Exception in StreamingLinearAlgorithm on Stream with Empty RDD.

["Paavo Parkkinen (JIRA)" <ji...@apache.org>]

Paavo Parkkinen created SPARK-8200:
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             Summary: Exception in StreamingLinearAlgorithm on Stream with Empty RDD.
                 Key: SPARK-8200
                 URL: https://issues.apache.org/jira/browse/SPARK-8200
             Project: Spark
          Issue Type: Bug
          Components: MLlib, Streaming
    Affects Versions: 1.3.1
         Environment: Ubuntu 14.04.2 LTS
Linux 3.13.0-45-generic #74-Ubuntu SMP Tue Jan 13 19:36:28 UTC 2015
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
Scala code runner version 2.10.4 -- Copyright 2002-2013, LAMP/EPFL

            Reporter: Paavo Parkkinen
            Priority: Minor


When training a streaming logistic regression model or a streaming linear regression model, any empty RDDs in a stream will cause an exception.

  java.lang.UnsupportedOperationException: empty collection
  at org.apache.spark.rdd.RDD$$anonfun$first$1.apply(RDD.scala:1288)
  at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:148)
  at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:109)
  at org.apache.spark.rdd.RDD.withScope(RDD.scala:286)
  at org.apache.spark.rdd.RDD.first(RDD.scala:1285)
  at org.apache.spark.mllib.regression.GeneralizedLinearAlgorithm.run(GeneralizedLinearAlgorithm.scala:215)
  at org.apache.spark.mllib.regression.StreamingLinearAlgorithm$$anonfun$trainOn$1.apply(StreamingLinearAlgorithm.scala:91)
  at org.apache.spark.mllib.regression.StreamingLinearAlgorithm$$anonfun$trainOn$1.apply(StreamingLinearAlgorithm.scala:85)
  at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ForEachDStream.scala:42)
  at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ForEachDStream.scala:40)




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