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Posted to commits@hudi.apache.org by "Alexey Kudinkin (Jira)" <ji...@apache.org> on 2023/01/18 23:42:00 UTC

[jira] [Created] (HUDI-5579) Fixing Kryo classes registration for Spark

Alexey Kudinkin created HUDI-5579:
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             Summary: Fixing Kryo classes registration for Spark
                 Key: HUDI-5579
                 URL: https://issues.apache.org/jira/browse/HUDI-5579
             Project: Apache Hudi
          Issue Type: Bug
          Components: spark
            Reporter: Alexey Kudinkin
            Assignee: Alexey Kudinkin
             Fix For: 0.13.0


Due to RFC-46 the profile of the data being serialized by Hudi had changed considerably: previously we're mostly passing around Avro payloads, while now we hold our own internal {{HoodieRecord}} implementations.

When classes are not explicitly registered w/ Kryo, it would have to serialize class fully qualified name (FQN) as id every time an object is serialized, which carries a lot of [unnecessary overhead|https://github.com/apache/hudi/pull/7026/files#diff-81f9b48f7f7e71b46ea8764c7d63e310c871895d03640ae93c81b09f38306acb].

To work this around in [#7026|https://github.com/apache/hudi/pull/7026] added {{HoodieSparkKryoRegistrar}} registering some of the commonly serialized Hudi classes. However, during rebasing/merging of the RFC-46 feature branch this changes have been partially reverted and so we need to restore that.



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