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### What changes were proposed in this pull request? This PR aims to new Prometheus-format metric endpoints experimental in Apache Spark 3.0.0. ### Why are the changes needed? Although the new metrics are disabled by default, we had better make it experimental explicitly in Apache Spark 3.0.0 since the output format is still not fixed. We can finalize it in Apache Spark 3.1.0. ### Does this PR introduce _any_ user-facing change? Only doc-change is visible to the users. ### How was this patch tested? Manually check the code since this is a documentation and class annotation change. Closes #28495 from dongjoon-hyun/SPARK-31674. Authored-by: Dongjoon Hyun <dongjoon@apache.org> Signed-off-by: Dongjoon Hyun <dongjoon@apache.org> |
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