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https://issues.apache.org/jira/browse/BEAM-3557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16342831#comment-16342831
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Chamikara Jayalath commented on BEAM-3557:
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cc: [~charleschen] [~robertwb]
> Converting to runner api protos and back results in parent pointers being
> dropped
> ---------------------------------------------------------------------------------
>
> Key: BEAM-3557
> URL: https://issues.apache.org/jira/browse/BEAM-3557
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Chamikara Jayalath
> Priority: Major
>
> We currently convert transform graph to runner API protos and back at
> following location. Seems like this results in parent pointers being dropped
> for all AppliedTransform objects of the graph. Looks like this doesn't have
> an impact in pipeline execution for Direct and Dataflow runners though (given
> that all tests pass).
> [https://github.com/apache/beam/blob/master/sdks/python/apache_beam/pipeline.py#L332]
>
>
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