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https://issues.apache.org/jira/browse/BEAM-1937?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965227#comment-15965227
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Thomas Groh commented on BEAM-1937:
-----------------------------------
This is due to the fact that a reapplied transform gets the name of the
transform it is replacing, but all of the names within it are marked as used.
This can be fixed by traversing when and after we've found a match, and
extracting the used names, removing them before applying any replacements.
> PipelineSurgery renumbers already-unique transforms
> ---------------------------------------------------
>
> Key: BEAM-1937
> URL: https://issues.apache.org/jira/browse/BEAM-1937
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: Daniel Halperin
> Assignee: Thomas Groh
> Attachments: wordcount renumbered.png
>
>
> In the attached WordCount graph, it appears that some transforms have a 2 at
> the end after submission. However, I'm pretty confident that there only 1
> finalize and only 1 WriteBundles in this graph.
> [~tgroh] believes this is a bug in pipeline surgery.
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