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https://issues.apache.org/jira/browse/SPARK-15489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15304893#comment-15304893
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Amit Sela commented on SPARK-15489:
-----------------------------------
The issue here is the fact that setting the SparkConf does not propagate to the
KryoSerializer used by the encoder.
I managed to make this work by using Java System properties instead of
SparkConf#set since the SparkConf constructor will take them into account, but
it's a hack...
For now I think I'll change the description of the issue, and propose this as a
temporary solution.
> Dataset kryo encoder fails on Collections$UnmodifiableCollection
> ----------------------------------------------------------------
>
> Key: SPARK-15489
> URL: https://issues.apache.org/jira/browse/SPARK-15489
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.1
> Reporter: Amit Sela
>
> When using Encoders with kryo to encode generically typed Objects in the
> following manner:
> public static <T> Encoder<T> encoder() {
> return Encoders.kryo((Class<T>) Object.class);
> }
> I get a decoding exception when trying to decode
> `java.util.Collections$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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