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Batuhan Osman TASKAYA
cpython
Commits
f8859e18
Kaydet (Commit)
f8859e18
authored
Eki 24, 2011
tarafından
Charles-François Natali
Dosyalara gözat
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Eposta Yamaları
Sade Fark
Issue #10332: multiprocessing: fix a race condition when a Pool is closed
before all tasks have completed.
üst
d6ca6c2b
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3 changed files
with
22 additions
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1 deletion
+22
-1
pool.py
Lib/multiprocessing/pool.py
+5
-1
test_multiprocessing.py
Lib/test/test_multiprocessing.py
+14
-0
NEWS
Misc/NEWS
+3
-0
No files found.
Lib/multiprocessing/pool.py
Dosyayı görüntüle @
f8859e18
...
...
@@ -321,7 +321,11 @@ class Pool(object):
@staticmethod
def
_handle_workers
(
pool
):
while
pool
.
_worker_handler
.
_state
==
RUN
and
pool
.
_state
==
RUN
:
thread
=
threading
.
current_thread
()
# Keep maintaining workers until the cache gets drained, unless the pool
# is terminated.
while
thread
.
_state
==
RUN
or
(
pool
.
_cache
and
thread
.
_state
!=
TERMINATE
):
pool
.
_maintain_pool
()
time
.
sleep
(
0.1
)
# send sentinel to stop workers
...
...
Lib/test/test_multiprocessing.py
Dosyayı görüntüle @
f8859e18
...
...
@@ -1217,6 +1217,20 @@ class _TestPoolWorkerLifetime(BaseTestCase):
p
.
close
()
p
.
join
()
def
test_pool_worker_lifetime_early_close
(
self
):
# Issue #10332: closing a pool whose workers have limited lifetimes
# before all the tasks completed would make join() hang.
p
=
multiprocessing
.
Pool
(
3
,
maxtasksperchild
=
1
)
results
=
[]
for
i
in
range
(
6
):
results
.
append
(
p
.
apply_async
(
sqr
,
(
i
,
0.3
)))
p
.
close
()
p
.
join
()
# check the results
for
(
j
,
res
)
in
enumerate
(
results
):
self
.
assertEqual
(
res
.
get
(),
sqr
(
j
))
#
# Test that manager has expected number of shared objects left
#
...
...
Misc/NEWS
Dosyayı görüntüle @
f8859e18
...
...
@@ -58,6 +58,9 @@ Core and Builtins
Library
-------
- Issue #10332: multiprocessing: fix a race condition when a Pool is closed
before all tasks have completed.
- Issue #13255: wrong docstrings in array module.
- Issue #9168: now smtpd is able to bind privileged port.
...
...
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