[spark] branch branch-3.0 updated: [SPARK-33176][K8S] Use 11-jre-slim as default in K8s Dockerfile

[do...@apache.org]

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dongjoon pushed a commit to branch branch-3.0
in repository https://gitbox.apache.org/repos/asf/spark.git


The following commit(s) were added to refs/heads/branch-3.0 by this push:
     new 05fbbb1  [SPARK-33176][K8S] Use 11-jre-slim as default in K8s Dockerfile
05fbbb1 is described below

commit 05fbbb1fcea27b8f22009440d95a76a74de1f044
Author: Dongjoon Hyun <do...@apache.org>
AuthorDate: Sun Oct 18 09:21:07 2020 -0700

    [SPARK-33176][K8S] Use 11-jre-slim as default in K8s Dockerfile
    
    ### What changes were proposed in this pull request?
    
    This PR aims to use `openjdk:11-jre-slim` as default in K8s Dockerfile.
    
    ### Why are the changes needed?
    
    Although Apache Spark supports both Java8/Java11, there is a difference.
    
    1. Java8-built distribution can run both Java8/Java11
    2. Java11-built distribution can run on Java11, but not Java8.
    
    In short, we had better use Java11 in Dockerfile to embrace both cases without any issues.
    
    ### Does this PR introduce _any_ user-facing change?
    
    Yes. This will remove the change of user frustration when they build with JDK11 and build the image without overriding Java base image.
    
    ### How was this patch tested?
    
    Pass the K8s IT.
    
    Closes #30083 from dongjoon-hyun/SPARK-33176.
    
    Authored-by: Dongjoon Hyun <do...@apache.org>
    Signed-off-by: Dongjoon Hyun <dh...@apple.com>
---
 .../kubernetes/docker/src/main/dockerfiles/spark/Dockerfile             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile b/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
index cde9358..23d2b03 100644
--- a/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
+++ b/resource-managers/kubernetes/docker/src/main/dockerfiles/spark/Dockerfile
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-ARG java_image_tag=8-jre-slim
+ARG java_image_tag=11-jre-slim
 
 FROM openjdk:${java_image_tag}
 


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