[jira] [Work started] (BEAM-14330) google.api_core.exceptions.MethodNotImplemented when tests run in parallel

["Ning (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-14330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on BEAM-14330 started by Ning.
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> google.api_core.exceptions.MethodNotImplemented when tests run in parallel
> --------------------------------------------------------------------------
>
>                 Key: BEAM-14330
>                 URL: https://issues.apache.org/jira/browse/BEAM-14330
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-py-interactive
>            Reporter: Ning
>            Assignee: Ning
>            Priority: P2
>
> An error is thrown when tests run in parallel for interactive modules.
> >google.api_core.exceptions.MethodNotImplemented: 501 Received http2 header with status: 404
>  
> The cause is shared global singleton among tests: a cluster related test registers a cluster manager in the global state while a non-cluster test cleans up the global state without necessary mocking.
> The solution should be mock the global singleton in tests to isolate tests from each other.
> To reproduce the failure (note: parallel execution is non-deterministic), add something like '-n 5' when executing pytests.
> For example:
> >pytest -n 5 apache_beam/runners/interactive/interactive_runner_test.py



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