[SPARK-49418] Active/default ThreadLocals for shared SparkSession

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Connect, SQL
• Labels: pull-request-available

Environment

Not sure if we should do this. Connect and Classic have different semantics, so unification is a bit tricky.

• Epic Link: Unified SQL Scala Interface
• Assignee: Herman van Hövell
• Reporter: Herman van Hövell
• Created: 28/Aug/24 01:33
• Updated: 09/Oct/24 12:58
• Resolved: 09/Oct/24 12:58

Issue Links

• blocks: SPARK-49700 Switch interface and implementations
• links to: GitHub Pull Request #48374