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https://issues.apache.org/jira/browse/HUDI-4959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raymond Xu updated HUDI-4959:
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Sprint: 2022/09/19, 2022/10/04 (was: 2022/09/19)
> Serializing objects using Kryo fails to deserialize data back w/o prior
> registration
> ------------------------------------------------------------------------------------
>
> Key: HUDI-4959
> URL: https://issues.apache.org/jira/browse/HUDI-4959
> Project: Apache Hudi
> Issue Type: Bug
> Components: writer-core
> Affects Versions: 0.12.0
> Reporter: Alexey Kudinkin
> Assignee: Alexey Kudinkin
> Priority: Blocker
> Fix For: 0.13.0
>
>
> Originally reported in:
> https://github.com/apache/hudi/issues/6621
>
> Kryo (used in SerializationUtils) by default allows class objects to be
> serialized w/o prior registration w/ Kryo: in that case Kryo will encode the
> first occurrence of the object of a particular class with full class-name,
> but subsequent occurrences will be using class-id associated with it (on the
> fly).
> This poses issues for durable serialization (when we persist such serialized
> layout) in this case we're trying to deserialize file that doesn't have the
> class-name encoded and since user is running a different Spark job to read
> there's no association preserved in-memory either.
> *NOTE: We should be using custom serialization sequences for every object we
> serialize for durable persistence, and avoid using frameworks like Kryo for
> that.*
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