[GitHub] felixcheung commented on a change in pull request #23932: [SPARK-27026] [Build] Upgrade Docker image for release build to Ubuntu 18.04LTS

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felixcheung commented on a change in pull request #23932: [SPARK-27026] [Build] Upgrade Docker image for release build to Ubuntu 18.04LTS
URL: https://github.com/apache/spark/pull/23932#discussion_r261815262
 
 

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 File path: dev/create-release/spark-rm/Dockerfile
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 @@ -38,7 +42,8 @@ ARG PIP_PKGS="pyopenssl pypandoc numpy pygments sphinx"
 #
 # This is all in a single "RUN" command so that if anything changes, "apt update" is run to fetch
 # the most current package versions (instead of potentially using old versions cached by docker).
-RUN echo 'deb http://cran.cnr.Berkeley.edu/bin/linux/ubuntu xenial/' >> /etc/apt/sources.list && \
+RUN apt-get update && $APT_INSTALL gnupg && \
 
 Review comment:
   18.04 doesn't have gpg? I can see why here but nit all other places we are apt-get clean after
   (though maybe unnecessary in a build image)

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