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https://issues.apache.org/jira/browse/SPARK-2610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai updated SPARK-2610:
----------------------------
Priority: Minor (was: Major)
> When spark.serializer is set as org.apache.spark.serializer.KryoSerializer,
> importing a method causes multiple spark applications creations
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-2610
> URL: https://issues.apache.org/jira/browse/SPARK-2610
> Project: Spark
> Issue Type: Bug
> Affects Versions: 1.0.1
> Reporter: Yin Huai
> Priority: Minor
>
> To reproduce, set
> {code}
> spark.serializer org.apache.spark.serializer.KryoSerializer
> {code}
> in conf/spark-defaults.conf and launch a spark shell.
> Then, execute
> {code}
> class X() { println("What!"); def y = 3 }
> val x = new X
> import x.y
> case class Person(name: String, age: Int)
> val serializer = org.apache.spark.serializer.Serializer.getSerializer(null)
> val kryoSerializer = serializer.newInstance
> val value = kryoSerializer.serialize(Person("abc", 1))
> kryoSerializer.deserialize(value): Person
> // Once you execute this line, you will see ...
> // What!
> // What!
> // res1: Person = Person(abc,1)
> {code}
> Basically, importing a method of a class causes the constructor of that class
> been called twice.
> It affects our branch 1.0 and master.
> For the master, you can use
> {code}
> val serializer = org.apache.spark.serializer.Serializer.getSerializer(None)
> {code}
> to get the serializer.
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