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https://issues.apache.org/jira/browse/AIRFLOW-3887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16768946#comment-16768946
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Andrew Stahlman commented on AIRFLOW-3887:
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Submitted a PR to temporarily downgrade the dependency:
[https://github.com/apache/airflow/pull/4713]
But I think we should leave this open to track the long-term fix of upgrading
dagre-d3 after its next release.
> Dagre D3 Version 0.6.3 raises merge is not a function error
> -----------------------------------------------------------
>
> Key: AIRFLOW-3887
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3887
> Project: Apache Airflow
> Issue Type: Bug
> Affects Versions: 1.10.2
> Reporter: Felix Uellendall
> Priority: Major
> Attachments: Screen Shot 2019-02-06 at 16.13.05.png
>
>
> The latest version of Dagre D3 that we already use (0.6.3) contains a bug
> that causes the Graph View to stop working for D3 Version 3 that we are using.
> {noformat}
> TypeError: previousPaths.merge is not a function
> {noformat}
> !Screen Shot 2019-02-06 at 16.13.05.png!
> To temporary fix this you can pin your Dagre D3 version to 0.4.18
> The actual fix should be to set Dagre D3 to the next release that contains
> this bugfix.
> See: https://github.com/dagrejs/dagre-d3/pull/350
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