Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/20230#discussion_r160880463
--- Diff: external/docker/spark-test/base/Dockerfile ---
@@ -15,14 +15,14 @@
# limitations under the License.
#
-FROM ubuntu:precise
+FROM ubuntu:xenial
# Upgrade package index
-# install a few other useful packages plus Open Jdk 7
+# install a few other useful packages plus Open Jdk 8
# Remove unneeded /var/lib/apt/lists/* after install to reduce the
# docker image size (by ~30MB)
RUN apt-get update && \
- apt-get install -y less openjdk-7-jre-headless net-tools vim-tiny sudo
openssh-server && \
+ apt-get install -y less openjdk-8-jre-headless iproute2 vim-tiny sudo
openssh-server && \
--- End diff --
This is required to use
[ip](https://github.com/apache/spark/blob/master/external/docker/spark-test/master/default_cmd#L20)
command in `xenial`.
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