[jira] [Updated] (SPARK-15489) Dataset kryo encoder won't load custom user settings

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-15489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen updated SPARK-15489:
------------------------------
    Assignee: Amit Sela

> Dataset kryo encoder won't load custom user settings 
> -----------------------------------------------------
>
>                 Key: SPARK-15489
>                 URL: https://issues.apache.org/jira/browse/SPARK-15489
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.6.1
>            Reporter: Amit Sela
>            Assignee: Amit Sela
>             Fix For: 2.0.0
>
>
> When setting a custom "spark.kryo.registrator" (or any other configuration for that matter) through the API, this configuration will not propagate to the encoder that uses a KryoSerializer since it instantiates with "new SparkConf()".
> See:  https://github.com/apache/spark/blob/07c36a2f07fcf5da6fb395f830ebbfc10eb27dcc/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala#L554
> This could be hacked by providing those configurations as System properties, but this probably should be passed to the encoder and set in the SerializerInstance after creation.
> Example:
> When using Encoders with kryo to encode generically typed Objects in the following manner:
> public static <T> Encoder<T> encoder() {
>   return Encoders.kryo((Class<T>) Object.class);
> }
> I get a decoding exception when trying to decode `java.util.Collections$UnmodifiableCollection`, which probably comes from Guava's `ImmutableList`.
> This happens when running with master = local[1]. Same code had no problems with RDD api.



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