[FLINK-34422] BatchTestBase doesn't actually use MiniClusterExtension

• Type: Technical Debt
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.18.1
• Fix Version/s: 1.19.0, 1.18.2, 1.20.0
• Component/s: Test Infrastructure
• Labels: pull-request-available
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 11/Feb/24 00:17
• Updated: 12/Feb/24 16:22
• Resolved: 12/Feb/24 16:22

Description

BatchTestBase sets up a table environment in instance fields, which runs before the BeforeEachCallback from the MiniClusterExtension has time to run.
As a result the table environment internally creates a local stream environment, due to which all test extending the BatchTestBase are spawning separate mini clusters for every single job.

I believe this is on reason why we had troubles with enabling fork-reuse in the planner module

Issue Links

• links to: GitHub Pull Request #24298
• links to: GitHub Pull Request #24299
• links to: GitHub Pull Request #24301