Prasanth Jayachandran created HIVE-12424:
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Summary: Make use Kryo Object-to-Object deep copy
Key: HIVE-12424
URL: https://issues.apache.org/jira/browse/HIVE-12424
Project: Hive
Issue Type: Sub-task
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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