tkaymak opened a new pull request, #38255:
URL: https://github.com/apache/beam/pull/38255
Addresses #36841. Replaces #38212.
Builds on the shared base + per-version overrides plumbing introduced in
#38233 (merged). With that in place, Spark 4 support is reduced to:
- 11 genuine Java override files under `runners/spark/4/src/` (no
duplication of files that match the Spark 3 baseline)
- Build wiring: `runners/spark/4/build.gradle`, job-server module, container
Dockerfile
- Small Scala 2.12/2.13 compatibility tweaks to 7 files in the shared base
under `runners/spark/src/`
- `gradle.properties`: `spark_versions=3,4`
- CI: PreCommit + PostCommit Spark 4 workflows
The diff is intentionally surgical compared to #38212, which predated the
refactor and duplicated the entire Spark 3 source tree.
cc @Abacn — this is the slim follow-up we discussed.
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