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https://issues.apache.org/jira/browse/SPARK-9043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-9043:
-----------------------------------
Assignee: Apache Spark
> Serialize key, value and combiner classes in ShuffleDependency
> --------------------------------------------------------------
>
> Key: SPARK-9043
> URL: https://issues.apache.org/jira/browse/SPARK-9043
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Matt Massie
> Assignee: Apache Spark
>
> ShuffleManager implementations are currently not given type information
> regarding the key, value and combiner classes. Serialization of shuffle
> objects relies on them being JavaSerializable, with methods defined for
> reading/writing the object or, alternatively, serialization via Kryo which
> uses reflection.
> Serialization systems like Avro, Thrift and Protobuf generate classes with
> zero argument constructors and explicit schema information (e.g.
> IndexedRecords in Avro have get, put and getSchema methods).
> By serializing the key, value and combiner class names in ShuffleDependency,
> shuffle implementations will have access to schema information when
> registerShuffle() is called.
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