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  1. Beam
  2. BEAM-6708

Too many open files due grpc channel not being closed (direct runnner Pubsub source)

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.10.0
    • Fix Version/s: None
    • Component/s: runner-direct
    • Labels:
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      Description

      When '_read_from_pubsub' (runnners/direct/transform_evaluator.py:448) is being invoked, it will create a Pubsub SubscriberClient. This will create a grpc channel which is not being closed. When you run a pipeline with the direct runner which has a pubsub source in it, it will run eventually into an error: "too many open files". This is because these grpc channels are never being closed.

      The suggestion is to wrap the code after the creation of the client in a try/finally block and close the channel (exposed on sub_client.api.transport._channel) in the finally block.

       

      Some extra info about the issue: https://github.com/googleapis/google-cloud-python/issues/5523

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            • Assignee:
              Unassigned
              Reporter:
              Boenders Stefan Boenders
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              • Created:
                Updated: