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Posted to issues@spark.apache.org by "Iaroslav Zeigerman (JIRA)" <ji...@apache.org> on 2015/07/21 17:21:05 UTC
[jira] [Commented] (SPARK-9220) Streaming K-means implementation
exception while processing windowed stream
[ https://issues.apache.org/jira/browse/SPARK-9220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14635240#comment-14635240 ]
Iaroslav Zeigerman commented on SPARK-9220:
-------------------------------------------
Looks like the issue reproduces only when training and test data streams are linked to the same directory. Can someone confirm if this cause the issue?
> Streaming K-means implementation exception while processing windowed stream
> ---------------------------------------------------------------------------
>
> Key: SPARK-9220
> URL: https://issues.apache.org/jira/browse/SPARK-9220
> Project: Spark
> Issue Type: Bug
> Components: MLlib, Streaming
> Affects Versions: 1.4.1
> Reporter: Iaroslav Zeigerman
>
> Spark throws an exception when the Streaming K-means algorithm trains on a windowed stream. The stream looks like following:
> {{val trainingSet = ssc.textFileStream(TrainingDataSet).window(Seconds(30))...}}
> The exception occurs when there is no new data in the stream. Here is an exception:
> 15/07/21 17:36:08 ERROR JobScheduler: Error running job streaming job 1437489368000 ms.0
> java.lang.ArrayIndexOutOfBoundsException: 13
> at org.apache.spark.mllib.clustering.StreamingKMeansModel$$anonfun$update$1.apply(StreamingKMeans.scala:105)
> at org.apache.spark.mllib.clustering.StreamingKMeansModel$$anonfun$update$1.apply(StreamingKMeans.scala:102)
> at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
> at org.apache.spark.mllib.clustering.StreamingKMeansModel.update(StreamingKMeans.scala:102)
> at org.apache.spark.mllib.clustering.StreamingKMeans$$anonfun$trainOn$1.apply(StreamingKMeans.scala:235)
> at org.apache.spark.mllib.clustering.StreamingKMeans$$anonfun$trainOn$1.apply(StreamingKMeans.scala:234)
> 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)
> at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1$$anonfun$apply$mcV$sp$1.apply(ForEachDStream.scala:40)
> at org.apache.spark.streaming.dstream.DStream.createRDDWithLocalProperties(DStream.scala:399)
> at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply$mcV$sp(ForEachDStream.scala:40)
> at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(ForEachDStream.scala:40)
> at org.apache.spark.streaming.dstream.ForEachDStream$$anonfun$1.apply(ForEachDStream.scala:40)
> at scala.util.Try$.apply(Try.scala:161)
> at org.apache.spark.streaming.scheduler.Job.run(Job.scala:34)
> at org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply$mcV$sp(JobScheduler.scala:193)
> at org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply(JobScheduler.scala:193)
> at org.apache.spark.streaming.scheduler.JobScheduler$JobHandler$$anonfun$run$1.apply(JobScheduler.scala:193)
> at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
> at org.apache.spark.streaming.scheduler.JobScheduler$JobHandler.run(JobScheduler.scala:192)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> When the new data arrives the algorithm works as expected.
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