diff options
Diffstat (limited to 'Lib/concurrent/futures/process.py')
| -rw-r--r-- | Lib/concurrent/futures/process.py | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Lib/concurrent/futures/process.py b/Lib/concurrent/futures/process.py index adf2ab4759..07b5225d1d 100644 --- a/Lib/concurrent/futures/process.py +++ b/Lib/concurrent/futures/process.py @@ -40,7 +40,7 @@ Local worker thread: Process #1..n: - reads _CallItems from "Call Q", executes the calls, and puts the resulting - _ResultItems in "Request Q" + _ResultItems in "Result Q" """ __author__ = 'Brian Quinlan (brian@sweetapp.com)' @@ -49,8 +49,9 @@ import atexit import os from concurrent.futures import _base import queue +from queue import Full import multiprocessing -from multiprocessing.queues import SimpleQueue, Full +from multiprocessing import SimpleQueue from multiprocessing.connection import wait import threading import weakref @@ -240,6 +241,8 @@ def _queue_management_worker(executor_reference, "terminated abruptly while the future was " "running or pending." )) + # Delete references to object. See issue16284 + del work_item pending_work_items.clear() # Terminate remaining workers forcibly: the queues or their # locks may be in a dirty state and block forever. @@ -264,6 +267,8 @@ def _queue_management_worker(executor_reference, work_item.future.set_exception(result_item.exception) else: work_item.future.set_result(result_item.result) + # Delete references to object. See issue16284 + del work_item # Check whether we should start shutting down. executor = executor_reference() # No more work items can be added if: @@ -327,7 +332,7 @@ class ProcessPoolExecutor(_base.Executor): _check_system_limits() if max_workers is None: - self._max_workers = multiprocessing.cpu_count() + self._max_workers = os.cpu_count() or 1 else: self._max_workers = max_workers |