Joseph K. Bradley created SPARK-10164:
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Summary: GMM bug: match error
Key: SPARK-10164
URL: https://issues.apache.org/jira/browse/SPARK-10164
Project: Spark
Issue Type: Bug
Components: MLlib
Affects Versions: 1.5.0
Reporter: Joseph K. Bradley
Assignee: Joseph K. Bradley
Priority: Critical
GaussianMixture now distributes matrix decompositions for certain problem
sizes. Distributed computation actually fails, but this was not tested in unit
tests. This is a regression.
Here is an example failure:
{code}
Exception in thread "main" scala.MatchError: ArrayBuffer(0.05000000000000001,
0.05000000000000001, 0.05000000000000001, 0.05000000000000
001, 0.05000000000000001, 0.05000000000000001, 0.05000000000000001,
0.05000000000000001, 0.05000000000000001, 0.05000000000000001, 0.050
00000000000001, 0.05000000000000001, 0.05000000000000001, 0.05000000000000001,
0.05000000000000001, 0.05000000000000001, 0.0500000000000
0001, 0.05000000000000001, 0.05000000000000001, 0.05000000000000001) (of class
scala.collection.mutable.ArrayBuffer)
at scala.runtime.ScalaRunTime$.array_apply(ScalaRunTime.scala:71)
at scala.Array$.slowcopy(Array.scala:81)
at scala.Array$.copy(Array.scala:107)
at
org.apache.spark.mllib.clustering.GaussianMixture.run(GaussianMixture.scala:215)
at
mllib.perf.clustering.GaussianMixtureTest.run(GaussianMixtureTest.scala:60)
at mllib.perf.TestRunner$$anonfun$2.apply(TestRunner.scala:66)
at mllib.perf.TestRunner$$anonfun$2.apply(TestRunner.scala:64)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
at scala.collection.immutable.Range.foreach(Range.scala:141)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
at scala.collection.AbstractTraversable.map(Traversable.scala:105)
at mllib.perf.TestRunner$.main(TestRunner.scala:64)
at mllib.perf.TestRunner.main(TestRunner.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:672)
at
org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
15/08/21 21:25:33 INFO spark.SparkContext: Invoking stop() from shutdown hook
{code}
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