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When handling concurrent operations, prefer completion signals and proper thread management over arbitrary timeouts. This improves code reliability and prevents hangs or deadlocks.

For waiting on asynchronous processes:

• Instead of arbitrary timeouts that can cause flaky tests:

  # Avoid this
  wait_until(lambda: assert_condition(), timeout=120)
    
  # Prefer this
  env.storage_controller.reconcile_until_idle()
  wait_until(lambda: assert_condition())
  

For operations that might block indefinitely:

• Use thread pools to prevent the main execution thread from hanging:

  # Instead of potentially blocking code
  ps.restart()  # Could hang waiting for active status
    
  # Use a ThreadPoolExecutor for potentially blocking operations
  with concurrent.futures.ThreadPoolExecutor() as executor:
      future = executor.submit(ps.restart)
      # Continue execution or implement proper timeout handling
  

These patterns ensure that your concurrent code is more predictable, testable, and less prone to timing-dependent issues.