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fix: set a max jobs on win32 to avoid too many handles #1964

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fix: set a max jobs on win32 to avoid too many handles #1964

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10 changes: 9 additions & 1 deletion src/flake8/checker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
import multiprocessing.pool
import operator
import signal
import sys
import tokenize
from typing import Any
from typing import Generator
Expand Down Expand Up @@ -151,7 +152,14 @@ def _job_count(self) -> int:
# default to 1
if jobs.is_auto:
try:
return multiprocessing.cpu_count()
system_cpus = multiprocessing.cpu_count()

# Work around https://bugs.python.org/issue26903
return (
min(system_cpus, 61)
if sys.platform == "win32"
else system_cpus
)
except NotImplementedError:
return 0

Expand Down