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https://issues.apache.org/jira/browse/HIVE-12424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15014743#comment-15014743
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Sergey Shelukhin commented on HIVE-12424:
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Is this blocked on Kryo? Does it need to target 2.0?
> Make use of Kryo's Object-to-Object deep copy
> ---------------------------------------------
>
> Key: HIVE-12424
> URL: https://issues.apache.org/jira/browse/HIVE-12424
> Project: Hive
> Issue Type: Sub-task
> Components: Serializers/Deserializers
> Affects Versions: 2.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
>
> Currently, plan serialization and operator tree serialization uses Object ->
> bytes -> Object approach for deep copy. It also uses ByteArrayOutputStream as
> intermediate buffer whose write method is synchronized. Similarly read from
> ByteArrayInputStream is also synchronized. Also Utilities.clonePlan() creates
> a new HiveConf object that scans through conf directories and adds site.xml
> which is an expensive operation. All these can be avoided using Kryo's Object
> -> Object deep copy.
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