Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/22681#discussion_r224314585
--- Diff:
resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile ---
@@ -18,6 +18,7 @@
FROM openjdk:8-alpine
ARG spark_jars=jars
+ARG example_jars=examples/jars
--- End diff --
could we make this optional? if someone wants to build a smaller image
without example
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