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https://issues.apache.org/jira/browse/BEAM-1579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932915#comment-15932915
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ASF GitHub Bot commented on BEAM-1579:
--------------------------------------

GitHub user tgroh opened a pull request:

    https://github.com/apache/beam/pull/2274

    [BEAM-1579] Add a Batch-Surgery API

    Be sure to do all of the following to help us incorporate your contribution
    quickly and easily:
    
     - [ ] Make sure the PR title is formatted like:
       `[BEAM-<Jira issue #>] Description of pull request`
     - [ ] Make sure tests pass via `mvn clean verify`. (Even better, enable
           Travis-CI on your fork and ensure the whole test matrix passes).
     - [ ] Replace `<Jira issue #>` in the title with the actual Jira issue
           number, if there is one.
     - [ ] If this contribution is large, please file an Apache
           [Individual Contributor License 
Agreement](https://www.apache.org/licenses/icla.txt).
    
    ---
    This takes a list, applies all overrides in the order of the list, and
    validates that no more overrides are applicable.
    
    Port the DirectRunner to this API

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

    $ git pull https://github.com/tgroh/beam ordered_overrides

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

    https://github.com/apache/beam/pull/2274.patch

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

    This closes #2274
    
----
commit 4c9c0748cb0c41d2ec49acc58348eae90fa62ca0
Author: Thomas Groh <[email protected]>
Date:   2017-03-17T23:17:20Z

    Provide methods for validating Surgery completion
    
    This takes a list, applies all overrides in the order of the list, and
    validates that no more overrides are applicable.

commit 9fb14a932b3c77baac02013227a4dd0af3d4a1bf
Author: Thomas Groh <[email protected]>
Date:   2017-03-17T23:39:58Z

    Port the DirectRunner to the Group Surgery API

----


> Runners should verify that PT overrides converged
> -------------------------------------------------
>
>                 Key: BEAM-1579
>                 URL: https://issues.apache.org/jira/browse/BEAM-1579
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-core, runner-dataflow, runner-direct
>            Reporter: Eugene Kirpichov
>            Assignee: Thomas Groh
>
> PT overrides are applied in order, see 
> https://issues.apache.org/jira/browse/BEAM-1578 .
> To make sure that the order is correct and avoid confusing errors, after 
> applying the overrides in order, we should verify that the pipeline has 
> converged, i.e. the overrides no longer match.



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