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https://issues.apache.org/jira/browse/BEAM-7874?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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yifan zou resolved BEAM-7874.
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Resolution: Fixed
> FnApi only supports up to 10 workers
> ------------------------------------
>
> Key: BEAM-7874
> URL: https://issues.apache.org/jira/browse/BEAM-7874
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Hannah Jiang
> Assignee: Hannah Jiang
> Priority: Blocker
> Fix For: 2.15.0
>
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> Because max_workers of grpc servers are hardcoded to 10, it only supports up
> to 10 workers, and if we pass more direct_num_workers greater than 10,
> pipeline hangs, because not all workers get connected to the runner.
> [https://github.com/apache/beam/blob/master/sdks/python/apache_beam/runners/portability/fn_api_runner.py#L1141]
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