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https://issues.apache.org/jira/browse/BEAM-10192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17126174#comment-17126174
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Harrison commented on BEAM-10192:
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This may be related to BEAM-2988
> Duplicate PubSub subscriptions with python direct runner in Jupyter/Colab
> environment
> -------------------------------------------------------------------------------------
>
> Key: BEAM-10192
> URL: https://issues.apache.org/jira/browse/BEAM-10192
> Project: Beam
> Issue Type: Bug
> Components: io-py-gcp
> Affects Versions: 2.22.0
> Environment: Ubuntu 18 (Colab notebook), Python SDK
> Reporter: Harrison
> Priority: P2
>
> When running a streaming pipeline on Colab with direct runner, ReadFromPubSub
> can retain old subscriptions and cause message duplication. For example,
> manually killing a cell that is running a streaming pubsub pipeline does not
> delete the pubsub subscription. If the cell is rerun, the ReadFromPubSub
> component will actually be subscribed twice which results in duplicate
> messages.
> Manually deleting old subscriptions (e.g. via the GCP dashboard) temporarily
> fixes the problem.
> This Colab notebook:
> [https://gist.github.com/hgarrereyn/64ce87cbbcbe9c34ccdd13eafe49e3fb]
> contains a runnable example of the bug.
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