[SPARK-33793][TESTS][3.0] Introduce withExecutor to ensure proper cleanup in tests #30801
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Backport of: #30783
What changes were proposed in this pull request?
This PR introduces a helper method
withExecutor
that handles the creation of an Executor object and ensures that it is always stopped in a finally block. The tests in ExecutorSuite have been refactored to use this method.Why are the changes needed?
Recently an issue was discovered that leaked Executors (which are not explicitly stopped after a test) can cause other tests to fail due to the JVM being killed after 10 min. It is therefore crucial that tests always stop the Executor. By introducing this helper method, a simple pattern is established that can be easily adopted in new tests, which reduces the risk of regressions.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Run the ExecutorSuite locally.