dongjoon-hyun opened a new pull request #26417: [SPARK-29781][BUILD][2.4] 
Override SBT Jackson dependency like Maven
URL: https://github.com/apache/spark/pull/26417
 
 
   ### What changes were proposed in this pull request?
   
   This PR aims to override SBT `jackson-databind` dependency like Maven in 
`branch-2.4`.
   
   ### Why are the changes needed?
   
   Without this, SBT and Maven works differently in `branch-2.4`. We had better 
fix this in `branch-2.4` because it's our LTS branch.
   
   ```
   $ build/sbt -Phadoop-3.1 "core/testOnly *.ShuffleDependencySuite"
   [info] ShuffleDependencySuite:
   [info] org.apache.spark.shuffle.ShuffleDependencySuite *** ABORTED ***
   ...
   [info]   Cause: com.fasterxml.jackson.databind.JsonMappingException: 
Incompatible Jackson version: 2.7.8
   ```
   
   ### Does this PR introduce any user-facing change?
   
   No.
   
   ### How was this patch tested?
   
   Manually do `build/sbt -Phadoop-3.1 "core/testOnly 
*.ShuffleDependencySuite"`.
   

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