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From "Xinyu Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SAMZA-1567) Allow user WatermarkFunction to exclude streams from Watermark computation
Date Fri, 26 Jan 2018 21:07:00 GMT

    [ https://issues.apache.org/jira/browse/SAMZA-1567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341599#comment-16341599
] 

Xinyu Liu commented on SAMZA-1567:
----------------------------------

Looks like I can figure out a way in BEAM runner without adding this weird logic in Samza.
Close the ticket.

> Allow user WatermarkFunction to exclude streams from Watermark computation
> --------------------------------------------------------------------------
>
>                 Key: SAMZA-1567
>                 URL: https://issues.apache.org/jira/browse/SAMZA-1567
>             Project: Samza
>          Issue Type: Bug
>    Affects Versions: 0.15.0
>            Reporter: Xinyu Liu
>            Assignee: Xinyu Liu
>            Priority: Major
>             Fix For: 0.15.0
>
>
> Current watermark logic calculates the watermark based on the watermark from all the
upstream operators. BEAM has a very special use case that requires excluding certain streams
from this calcuation (view streams), and the watermark from these streams should be directly
passed down to the WatermarkFunction.



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