[SPARK-11042] Introduce a mechanism to ban creating new root SQLContexts in a JVM

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.6.0
• Component/s: SQL
• Target Version/s: 1.6.0
• Assignee: Yin Huai
• Reporter: Yin Huai
• Created: 10/Oct/15 01:58
• Updated: 12/Oct/15 20:50
• Resolved: 12/Oct/15 20:50

Description

For some use cases, it will be useful to explicitly ban creating multiple root SQLContexts/HiveContexts. At here root SQLContext means the first SQLContext that gets created.

Issue Links

• links to: [Github] Pull Request #9058 (yhuai)
• links to: [Github] Pull Request #9077 (yhuai)