Github user liyinan926 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19717#discussion_r155710752
--- Diff:
resource-managers/kubernetes/docker/src/main/dockerfiles/spark-base/Dockerfile
---
@@ -0,0 +1,47 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+FROM openjdk:8-alpine
--- End diff --
The docker files in this PR are for references only for now, and are by no
means the official docker images moving forward. We will address concerns
around the base image as part of SPARK-22647.
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