Critical bug fix: The scheduler's runSettingsChecker() goroutine was
started but never marked as complete in the WaitGroup, causing
scheduler.Stop() to hang indefinitely waiting for wg.Wait().
Changes:
- Add defer s.wg.Done() call in scheduler.Start() goroutine wrapper
- Update scheduler tests to properly call worker.Shutdown()
- Add nil check for timer.Stop() to prevent panics from nil timers
- Fix TestScheduler_StopWithActiveTimers to use proper shutdown sequence
Impact:
- Fixes test hanging issue in `make test` command
- Enables graceful shutdown of scheduler in production
- Prevents goroutine leaks in long-running applications
- All unit tests now complete successfully
Root cause: WaitGroup.Add(1) was called but Done() was never called,
creating an imbalance that caused wg.Wait() to block forever.
john-okeefe
70acecc33a