Kent Yao created SPARK-55710:
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             Summary: Use Google Mirror of Maven Central for SBT bootstrap
                 Key: SPARK-55710
                 URL: https://issues.apache.org/jira/browse/SPARK-55710
             Project: Spark
          Issue Type: Improvement
          Components: Build
    Affects Versions: 4.2.0
            Reporter: Kent Yao


Currently, the SBT bootstrap script (build/sbt-launch-lib.bash) defaults to 
downloading the sbt-launch jar from Maven Central (repo1.maven.org). However, 
the rest of the SBT build already uses Google's Maven Central mirror 
(maven-central.storage-download.googleapis.com) as the primary resolver, as 
configured in project/repositories and project/SparkBuild.scala.\n\nThis PR 
changes the default bootstrap URL to use the Google mirror as well, for 
consistency and to avoid flaky Maven Central connections during the initial 
sbt-launch jar download.\n\nThe DEFAULT_ARTIFACT_REPOSITORY environment 
variable can still be used to override this.



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