[Feature Request][Spark] Support Spark 4 + Java 21

[jimsimon-wk]

Feature request

Which Delta project/connector is this regarding?

• [x] Spark
• [ ] Standalone
• [ ] Flink
• [ ] Kernel
• [ ] Other (fill in here)

Overview

Are there plans to upgrade the Spark connector to use Spark 4.x?

Motivation

• Compatibility with Java 21 (SPARK-41111)

Further details

It looks like Spark 4.x is also dropping Scala 2.12 in favor of 2.13. Is the Spark connector compatible with Scala 2.13 today?

Willingness to contribute

The Delta Lake Community encourages new feature contributions. Would you or another member of your organization be willing to contribute an implementation of this feature?

• [ ] Yes. I can contribute this feature independently.
• [x] Yes. I would be willing to contribute this feature with guidance from the Delta Lake community.
• [ ] No. I cannot contribute this feature at this time.

[jimsimon-wk]

🤔 Nevermind, I think I found the plan details! https://github.com/delta-io/delta/releases/tag/v4.0.0rc1