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https://issues.apache.org/jira/browse/HIVE-22944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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László Bodor updated HIVE-22944:
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Fix Version/s: 4.0.0
> Upgrade to Kryo5
> ----------------
>
> Key: HIVE-22944
> URL: https://issues.apache.org/jira/browse/HIVE-22944
> Project: Hive
> Issue Type: Improvement
> Reporter: László Bodor
> Assignee: László Bodor
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-22944.01.patch, kryo4_vs_5_benchmark.log
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Maybe we should consider upgrading to kryo5 (plan ser/deser). Not sure about
> performance benefits, but looking at the code, e.g. FieldSerializer in Kryo5
> seems to let us extend it easier (less private fields), which could be a
> benefit if we want to change its behavior, e.g. defining different logic for
> different fields of an object.
> Kryo 4 FieldSerializer:
> https://github.com/EsotericSoftware/kryo/blob/kryo-4/src/com/esotericsoftware/kryo/serializers/FieldSerializer.java
> Kryo 5 FieldSerialier:
> https://github.com/EsotericSoftware/kryo/blob/master/src/com/esotericsoftware/kryo/serializers/FieldSerializer.java
> UPDATE: currently we are at kryo 5.0.3
> TODO: why kryo-shaded artifact has been used so far?
> https://javalibs.com/artifact/com.esotericsoftware/kryo-shaded
> "This contains the shaded reflectasm jar to prevent conflicts with other
> versions of asm."
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