[jira] [Created] (BEAM-9443) support direct_num_workers=0

[Hannah Jiang (Jira)]

Hannah Jiang created BEAM-9443:
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             Summary: support direct_num_workers=0 
                 Key: BEAM-9443
                 URL: https://issues.apache.org/jira/browse/BEAM-9443
             Project: Beam
          Issue Type: Bug
          Components: sdk-py-core
            Reporter: Hannah Jiang
            Assignee: Hannah Jiang
             Fix For: 2.21.0


when direct_num_workers=0, set it to number of cores.



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