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From "Julia (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (REEF-1392) Adding IObserver<ICloseEvent> for IMRU tasks
Date Wed, 18 May 2016 19:06:12 GMT

    [ https://issues.apache.org/jira/browse/REEF-1392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15289610#comment-15289610
] 

Julia commented on REEF-1392:
-----------------------------

To support it, we also need to update the design doc to allow task state to change from TaskClosedByDriver
to TaskCompleted. It is a easy change though. 

> Adding IObserver<ICloseEvent> for IMRU tasks
> --------------------------------------------
>
>                 Key: REEF-1392
>                 URL: https://issues.apache.org/jira/browse/REEF-1392
>             Project: REEF
>          Issue Type: Task
>            Reporter: Julia
>            Assignee: Julia
>              Labels: FT
>
> For fault tolerant, IMRU tasks, MapTaskHost and UpdateTaskHost should implement  IObserver<ICloseEvent>.
When they receive ICloseEvent,  it will verify if the closing event is send from driver based
on the message in the event, then trow IMRUTaskException with a define message to inform the
driver it is closed. 
> The  change should be backward compatible. If the the IMRU tasks are not bound to the
task configuration for  TaskConfiguration.OnClose, the event won't be received. 



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