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https://issues.apache.org/jira/browse/SPARK-17350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-17350.
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Resolution: Fixed
Fix Version/s: 2.1.0
> Disable default use of KryoSerializer in Thrift Server
> ------------------------------------------------------
>
> Key: SPARK-17350
> URL: https://issues.apache.org/jira/browse/SPARK-17350
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Fix For: 2.1.0
>
>
> In SPARK-4761 (December 2014) we enabled Kryo serialization by default in the
> Spark Thrift Server. However, I don't think that the original rationale for
> doing this still holds as all Spark SQL serialization should now be performed
> via efficient encoders and our UnsafeRow format. In addition, the use of Kryo
> as the default serializer can introduce performance problems because the
> creation of new KryoSerializer instances is expensive and we haven't
> performed instance-reuse optimizations in several code paths (including
> DirectTaskResult deserialization). Given all of this, I propose to revert
> back to using JavaSerializer as the default serializer in the Thrift Server.
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