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https://issues.apache.org/jira/browse/FLINK-10386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16638426#comment-16638426
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ASF GitHub Bot commented on FLINK-10386:
----------------------------------------

TisonKun edited a comment 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. If so, we remove 
those assertion because we don't send those message and the assertion should 
not hold.

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> Remove legacy class TaskExecutionStateListener
> ----------------------------------------------
>
>                 Key: FLINK-10386
>                 URL: https://issues.apache.org/jira/browse/FLINK-10386
>             Project: Flink
>          Issue Type: Sub-task
>          Components: TaskManager
>    Affects Versions: 1.7.0
>            Reporter: tison
>            Assignee: tison
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.7.0
>
>
> After a discussion 
> [here|https://github.com/apache/flink/commit/0735b5b935b0c0757943e2d58047afcfb9949560#commitcomment-30584257]
>  with [~trohrm...@apache.org]. I start to analyze the usage of 
> {{ActorGatewayTaskExecutionStateListener}} and {{TaskExecutionStateListener}}.
> In conclusion, we abort {{TaskExecutionStateListener}} strategy and no any 
> component rely on it. Instead, we introduce {{TaskManagerActions}} to take 
> the role for the communication of {{Task}} with {{TaskManager}}. No one 
> except {{TaskManager}} should directly communicate with {{Task}}. So it can 
> be safely remove legacy class {{TaskExecutionStateListener}}.



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