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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (BEAM-22) DirectPipelineRunner: support for unbounded collections
Date Mon, 18 Apr 2016 20:29:25 GMT


ASF GitHub Bot commented on BEAM-22:

GitHub user tgroh opened a pull request:

    [BEAM-22] Track Synchronized Processing Time Holds per-element

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    This removes the concept of a Bundle in watermark tracking.
    Bundles are still used to start & finish work, but are not referenced within
    the actual Watermark objects.

You can merge this pull request into a Git repository by running:

    $ git pull ippr_synchronized_processing_holds_per_element

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #202
commit 310808c42f25604cd3c93f106f8eec5d70e23e9a
Author: Thomas Groh <>
Date:   2016-03-29T20:26:08Z

    Track Synchronized Processing Time Holds per-element
    This removes the concept of a Bundle in watermark tracking.


> DirectPipelineRunner: support for unbounded collections
> -------------------------------------------------------
>                 Key: BEAM-22
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-direct
>            Reporter: Davor Bonaci
>            Assignee: Thomas Groh
> DirectPipelineRunner currently runs over bounded PCollections only, and implements only
a portion of the Beam Model.
> We should improve it to faithfully implement the full Beam Model, such as add ability
to run over unbounded PCollections, and better resemble execution model in a distributed system.
> This further enables features such as a testing source which may simulate late data and
test triggers in the pipeline. Finally, we may want to expose an option to select between
"debug" (single threaded), "chaos monkey" (test as many model requirements as possible), and
"performance" (multi-threaded).
> more testing (chaos monkey) 
> Once this is done, we should update this StackOverflow question:

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