TisonKun commented on issue #6729: [FLINK-10386] [taskmanager] Remove legacy class TaskExecutionStateListener URL: https://github.com/apache/flink/pull/6729#issuecomment-427071700 All "Why are we removing these assertions?" is as you say, we do not send those state updates via `TaskManagerActions.updateTaskExecutionState`. Maybe we can verify `TaskManagerActions.notifyFatalError`/`TaskManagerActions.failTask`/`TaskManagerActions.notifyFinalState` but all of them don't include detail task state. Besides, as the communication with @Clarkkkkk , `TaskTest` is a test based on legacy mode, there is a pull request #6778 to port it to FLIP-6 code base. I think the main issue is whether we replace `notifyObservers` with `TaskManagerActions.updateTaskExecutionState`. My opinion is not for now to hold the current(FLIP-6) message flow and defer the decision later. If so, we remove those assertion because we don't send those message and the assertion should not hold.
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