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https://issues.apache.org/jira/browse/BEAM-7885?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pablo Estrada reassigned BEAM-7885:
-----------------------------------
Assignee: Pablo Estrada
> DoFn.setup() don't run for streaming jobs on DirectRunner.
> -----------------------------------------------------------
>
> Key: BEAM-7885
> URL: https://issues.apache.org/jira/browse/BEAM-7885
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Affects Versions: 2.14.0
> Environment: Python
> Reporter: niklas Hansson
> Assignee: Pablo Estrada
> Priority: Minor
>
> From version 2.14.0 Python have introduced setup and teardown for DoFn in
> order to "Called to prepare an instance for processing bundles of
> elements.This is a good place to initialize transient in-memory resources,
> such as network connections."
> However when trying to use it for a unbounded job (pubsub source) it seams
> like the DoFn.setup() is never called and the resources are never initialize.
> [UPDATE] it is working for Dataflow runner but not for DirectRunner. For the
> Dataflow runner the DoFn.Setup seams to be called multiple times but then
> never again when the pipeline is processing elements [UPDATE] . For the
> direct runner I get:
> """"
> AttributeError: 'NoneType' object has no attribute 'predict' [while running
> 'transform the data']
> """
> My source code: [https://github.com/NikeNano/DataflowSklearnStreaming]
>
> I am happy to contribute with example code for how to use setup as soon as I
> get it running :)
>
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