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https://issues.apache.org/jira/browse/TEZ-844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddharth Seth updated TEZ-844:
-------------------------------

    Attachment: TEZ-844.2.txt

Updated patch with the callbacks simplified, and a bunch of workarounds till 
GruopedInputs get a context.

[~bikassaha], review please.

> Processors should have a mechanism to know when an Input is ready for 
> consumption
> ---------------------------------------------------------------------------------
>
>                 Key: TEZ-844
>                 URL: https://issues.apache.org/jira/browse/TEZ-844
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>         Attachments: TEZ-844.1.wip.txt, TEZ-844.2.txt
>
>
> Instead of polling, or blocking on a specific Reader, Processors should be 
> able to find out when a specific Input is ready.



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