Hi, All. As of now, Apache Spark sbt build is broken by the Maven Central repository policy.
- https://stackoverflow.com/questions/59764749/requests-to-http-repo1-maven-org-maven2-return-a-501-https-required-status-an > Effective January 15, 2020, The Central Maven Repository no longer supports insecure > communication over plain HTTP and requires that all requests to the repository are > encrypted over HTTPS. You can reproduce this locally by the following. $ rm -rf ~/.m2/repository/org/apache/apache/18/ $ build/sbt clean The usual suspects are the following two. - SBT: sbt 0.13.18 - Plugin: addSbtPlugin("org.spark-project" % "sbt-pom-reader" % "1.0.0-spark") Bests, Dongjoon.