[issue38430] Memory leak in ThreadPoolExecutor + run_in_executor
STINNER Victor
report at bugs.python.org
Thu Oct 10 05:52:38 EDT 2019
STINNER Victor <vstinner at python.org> added the comment:
Well, that's a common issue when using asyncio: you forgot await.
async def main(_loop):
while True:
with futures.ThreadPoolExecutor() as pool:
_loop.run_in_executor(pool, nop)
sys.stdout.write(f'\r{get_mem():0.3f}MB')
It should be: "await _loop.run_in_executor(pool, nop)" ;-)
Sadly, PYTHONASYNCIODEBUG=1 env var doesn't complain on this bug.
See: https://docs.python.org/dev/library/asyncio-dev.html#debug-mode
----------
nosy: +vstinner
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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<https://bugs.python.org/issue38430>
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