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concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used #90622

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@yilei

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@yilei
mannequin
BPO 46464
Nosy @gpshead, @pitrou, @methane, @yilei
PRs
  • gh-90622: Prevent concurrent.futures.process deadlock due to fork() after spawning a thread. #30847
  • Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = 'https://github.com/gpshead'
    closed_at = None
    created_at = <Date 2022-01-21.23:32:53.148>
    labels = ['3.11', 'library', '3.9', '3.10', 'performance']
    title = 'concurrent.futures.ProcessPoolExecutor can deadlock when tcmalloc is used'
    updated_at = <Date 2022-01-25.11:06:46.406>
    user = 'https://github.com/yilei'

    bugs.python.org fields:

    activity = <Date 2022-01-25.11:06:46.406>
    actor = 'pitrou'
    assignee = 'gregory.p.smith'
    closed = False
    closed_date = None
    closer = None
    components = ['Library (Lib)']
    creation = <Date 2022-01-21.23:32:53.148>
    creator = 'yilei'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 46464
    keywords = ['patch', '3.9regression']
    message_count = 7.0
    messages = ['411208', '411213', '411451', '411543', '411544', '411545', '411574']
    nosy_count = 4.0
    nosy_names = ['gregory.p.smith', 'pitrou', 'methane', 'yilei']
    pr_nums = ['30847']
    priority = 'normal'
    resolution = None
    stage = 'patch review'
    status = 'open'
    superseder = None
    type = 'resource usage'
    url = 'https://bugs.python.org/issue46464'
    versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']

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    3.10only security fixes3.11only security fixes3.9only security fixesperformancePerformance or resource usagestdlibPython modules in the Lib dir

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