[jira] [Updated] (HIVE-12424) Make use of Kryo's Object-to-Object deep copy

["Prasanth Jayachandran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-12424?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasanth Jayachandran updated HIVE-12424:
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    Summary: Make use of Kryo's Object-to-Object deep copy  (was: Make use Kryo Object-to-Object deep copy)

> 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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