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https://issues.apache.org/jira/browse/BEAM-6894?focusedWorklogId=225774&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-225774
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ASF GitHub Bot logged work on BEAM-6894:
----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Apr/19 18:45
Start Date: 10/Apr/19 18:45
Worklog Time Spent: 10m
Work Description: chamikaramj commented on pull request #8270:
[BEAM-6894] Updates Dataflow runner to support external ParDos.
URL: https://github.com/apache/beam/pull/8270
This is done by rebuilding the Pipeline object from the runner API proto if
experiment 'cross_language_pipeline' is set.
This rebuilding fails for some of the transforms, for example ParDos due to
Python ParDo object expecting a serialized Python DoFn object.
I get around this by introducing a holder object that will hold the
PTransform (and possibly other) proto objects till we try to build the
corresponding step at the Dataflow runner.
At the Dataflow runner, I added a new 'run_XX' method for such holder
PTransforms where we'll do the proper runner API proto to Dataflow API proto
conversion (currently only implemented for ParDos).
------------------------
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Post-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
Lang | SDK | Apex | Dataflow | Flink | Gearpump | Samza | Spark
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Go | [](https://builds.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/)
| --- | --- | --- | --- | --- | ---
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| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Streaming/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python_Verify/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python3_Verify/lastCompletedBuild/)
| --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)
<br> [](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PreCommit_Python_PVR_Flink_Cron/lastCompletedBuild/)
| --- | --- | ---
Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
--- |Java | Python | Go | Website
--- | --- | --- | --- | ---
Non-portable | [](https://builds.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/)
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| --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 225774)
Time Spent: 1.5h (was: 1h 20m)
> ExternalTransform.expand() does not create the proper AppliedPTransform
> sub-graph
> ---------------------------------------------------------------------------------
>
> Key: BEAM-6894
> URL: https://issues.apache.org/jira/browse/BEAM-6894
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Chamikara Jayalath
> Assignee: Chamikara Jayalath
> Priority: Major
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> 'ExternalTransform.expand()' can be used to expand a remote transform and
> build the correct runner-api subgraph for that transform. However currently
> we do not modify the AppliedPTransform sub-graph correctly during this
> process. Relevant code location here.
> [https://github.com/apache/beam/blob/master/sdks/python/apache_beam/transforms/external.py#L135]
>
> Without this, DataflowRunner that relies in this object graph (not just the
> runner API proto) to build the job submission request to Dataflow service
> cannot construct this request properly.
>
> cc: [~robertwb]
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