need to adapt Spark 3.x

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**BUG REPORT**

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- What did you expect to see?

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**FEATURE REQUEST**

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The issue names Spark 3.x but provides no files, tests, entry points, compatibility targets, or reproduction steps. First clarify which RocketMQ Externals component must be adapted and identify its current Spark integration and validation tests. Done cannot be defined until the required Spark 3.x behavior and supported versions are specified.

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