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https://issues.apache.org/jira/browse/FLINK-17012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17077193#comment-17077193
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Wenlong Lyu commented on FLINK-17012:
-------------------------------------

[~chesnay] for debugging, logging maybe enough, but it would be hard to 
integrated with other systems.

[~pnowojski] Idle Time currently is designed as a Meter, it is not good to set 
a meter to be -1 or MAX_VALUE. 

> Expose stage of task initialization
> -----------------------------------
>
>                 Key: FLINK-17012
>                 URL: https://issues.apache.org/jira/browse/FLINK-17012
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Metrics
>            Reporter: Wenlong Lyu
>            Priority: Major
>
> Currently a task switches to running before fully initialized, does not take 
> state initialization and operator initialization(#open ) in to account, which 
> may take long time to finish. As a result, there would be a weird phenomenon 
> that all tasks are running but throughput is 0. 
> I think it could be good if we can expose the initialization stage of tasks. 
> What to you think?



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