linliu-code opened a new pull request, #13990:
URL: https://github.com/apache/hudi/pull/13990
### Describe the issue this Pull Request addresses
Avro jar is responsible for generic Avro records, and Hudi jar defines some
Avro SpecificRecord type, like HoodiWriteStat.
When running Spark jobs with java 11+, Spark would load Avro jar and Hudi
jar using different class loaders, as causes the `java.lang.ClassCastException`
that when casting a GenericRecord to a Hudi defined SpecificRecord type.
### Summary and Changelog
One known solution to this issue is to explicitly construct the Hudi
specific records using the generic records with the same schema. This PR
implements this strategy for all important Hudi defined SpecificRecord types.
Unit tests for these SpecificRecord types have been added. Meanwhile, we
manually reproduced issue for HoodieDeleteRecordList type, and confirmed the
fix from this PR did solve the issue.
### Impact
Avoids the classloader issues proactively.
### Risk Level
Medium.
### Documentation Update
<!-- Describe any necessary documentation update if there is any new
feature, config, or user-facing change. If not, put "none".
- The config description must be updated if new configs are added or the
default value of the configs are changed.
- Any new feature or user-facing change requires updating the Hudi website.
Please follow the
[instruction](https://hudi.apache.org/contribute/developer-setup#website)
to make changes to the website. -->
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Enough context is provided in the sections above
- [ ] Adequate tests were added if applicable
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