[SPARK-51187][SQL][SS][3.5] Implement the graceful deprecation of incorrect config introduced in SPARK-49699 #49985
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Thank you for making this PR, @HeartSaVioR . I sent an email for further discussion. |
dongjoon-hyun
approved these changes
Feb 19, 2025
dongjoon-hyun
requested changes
Feb 19, 2025
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Oh, could you the old config to deprecatedSQLConfigs, @HeartSaVioR , please?
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What changes were proposed in this pull request?
This PR proposes to implement the graceful deprecation of incorrect config introduced in SPARK-49699.
SPARK-49699 was included in Spark 3.5.4, hence we can't simply rename to fix the issue.
Also, since the incorrect config is logged in offset log in streaming query, the fix isn't just easy like adding withAlternative and done. We need to manually handle the case where offset log contains the incorrect config, and set the value of incorrect config in the offset log into the new config. Once a single microbatch has planned after the restart (hence the above logic is applied), offset log will contain the "new" config and it will no longer refer to the incorrect config.
That said, we can remove the incorrect config in the Spark version which we are confident that there will be no case users will upgrade from Spark 3.5.4 to that version.
Why are the changes needed?
We released an incorrect config and we want to rename it properly. While renaming, we don't also want to have any breakage on the existing streaming query.
Does this PR introduce any user-facing change?
No. That is what this PR is aiming for.
How was this patch tested?
New UT.
Was this patch authored or co-authored using generative AI tooling?
No.