[jira] [Created] (SPARK-7483) [MLLib] Using Kryo with FPGrowth fails with an exception

["Tomasz Bartczak (JIRA)" <ji...@apache.org>]

Tomasz Bartczak created SPARK-7483:
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             Summary: [MLLib] Using Kryo with FPGrowth fails with an exception
                 Key: SPARK-7483
                 URL: https://issues.apache.org/jira/browse/SPARK-7483
             Project: Spark
          Issue Type: Bug
    Affects Versions: 1.3.1
            Reporter: Tomasz Bartczak


When using FPGrowth algorithm with KryoSerializer - Spark fails with

{code}
Job aborted due to stage failure: Task 0 in stage 9.0 failed 1 times, most recent failure: Lost task 0.0 in stage 9.0 (TID 16, localhost): com.esotericsoftware.kryo.KryoException: java.lang.IllegalArgumentException: Can not set final scala.collection.mutable.ListBuffer field org.apache.spark.mllib.fpm.FPTree$Summary.nodes to scala.collection.mutable.ArrayBuffer
Serialization trace:
nodes (org.apache.spark.mllib.fpm.FPTree$Summary)
org$apache$spark$mllib$fpm$FPTree$$summaries (org.apache.spark.mllib.fpm.FPTree)
{code}

This can be easily reproduced in spark codebase by setting 
{code}
conf.set("spark.serializer", "org.apache.spark.serializer.KryoSerializer")
{code} and running FPGrowthSuite.






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