[SPARK-33176] Use 11-jre-slim as default in K8s Dockerfile

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.1, 3.1.0
• Fix Version/s: 3.0.2, 3.1.0
• Component/s: Kubernetes
• Assignee: Dongjoon Hyun
• Reporter: Dongjoon Hyun
• Created: 18/Oct/20 06:30
• Updated: 18/Oct/20 16:23
• Resolved: 18/Oct/20 16:21

Description

Apache Spark supports both Java8/Java11. However, 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.

Issue Links

• links to: [Github] Pull Request #30083 (dongjoon-hyun)