[jira] [Commented] (BEAM-11784) Java pipeline proto serialization does not ensure topological ordering of root transforms

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-11784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17300446#comment-17300446 ] 

Beam JIRA Bot commented on BEAM-11784:
--------------------------------------

This issue is assigned but has not received an update in 30 days so it has been labeled "stale-assigned". If you are still working on the issue, please give an update and remove the label. If you are no longer working on the issue, please unassign so someone else may work on it. In 7 days the issue will be automatically unassigned.

> Java pipeline proto serialization does not ensure topological ordering of root transforms
> -----------------------------------------------------------------------------------------
>
>                 Key: BEAM-11784
>                 URL: https://issues.apache.org/jira/browse/BEAM-11784
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-core
>            Reporter: Kenneth Knowles
>            Assignee: Kenneth Knowles
>            Priority: P1
>              Labels: stale-assigned
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Seen these root orders when running {{ImpulseTest.testImpulse}}:
>  - {{["Impulse", "PAssert$0", "FlatMapElements"]}}
>  - {{["FlatMapElements", "PAssert$0", "Impulse"]}}
> Pipeline is:
> {code}
> PCollection<Integer> result =
>         p.apply(Impulse.create())
>             .apply(
>                 FlatMapElements.into(TypeDescriptors.integers())
>                     .via(impulse -> Arrays.asList(1, 2, 3)));
>     PAssert.that(result).containsInAnyOrder(1, 2, 3);
> {code}
> The topological order is linear and is neither of the above.



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