futex_uu状态下的python subprocess.Popen块
我试图实现一些基本的调度,一次最多生成n个进程。Popen,并等待它们执行。为此,我做了:futex_uu状态下的python subprocess.Popen块,python,multithreading,subprocess,Python,Multithreading,Subprocess,我试图实现一些基本的调度,一次最多生成n个进程。Popen,并等待它们执行。为此,我做了: CHECKING_INTERVAL = 10 class StandAloneClient(object): """ Instead of communicating with a backend cluster, fire locally a new thread. """ max_thread_nr = 4 thread_pool = [] pendi
CHECKING_INTERVAL = 10
class StandAloneClient(object):
"""
Instead of communicating with a backend cluster, fire locally a new thread.
"""
max_thread_nr = 4
thread_pool = []
pending_operations = Queue.Queue(0)
class OperationExecutor(threading.Thread):
def run(self):
"""
Get the required data from the operation queue and launch the operation.
"""
while True:
launch_data = StandAloneClient.pending_operations.get()
if launch_data != None:
operation_id = launch_data[0]
user_name_label = launch_data[1]
LOGGER.debug("Launching operation " + str(operation_id) + " with name " + str(user_name_label))
## Create a new process for the new launched operation
oper = ['python', '-m', 'processRunner', str(operation_id), user_name_label]
launched_process = Popen(oper, stdout=PIPE, stdin=PIPE, stderr=PIPE)
# launched_process.wait()
# while launched_process.poll() is None:
# sleep(CHECKING_INTERVAL)
# LOGGER.debug("Operation id=%s is still running. Going to sleep for %s seconds."%(operation_id,
# CHECKING_INTERVAL))
LOGGER.debug("===========================================================")
LOGGER.debug("Finished operation %s succesfully."%(operation_id,))
def __init__(self):
"""
If there are still empty spots create a new executor thread.
"""
for _ in xrange(self.max_thread_nr - len(self.thread_pool)):
new_executor = StandAloneClient.OperationExecutor()
self.thread_pool.append(new_executor)
new_executor.start()
@staticmethod
def execute(operation_id, user_name_label="Unknown"):
"""Start asynchronous operation locally"""
StandAloneClient.pending_operations.put((operation_id, user_name_label))
我正在通过以下方式向队列添加操作:
StandAloneClient().execute(...)
现在我已经评论了我认为可能由于某种原因而阻塞线程的部分。但即便如此,似乎没有一个孩子是永远不会出生的。执行一直持续到结束,我已经检查了日志,processRunner.py
完成了它需要执行的所有操作,直到结束,但是如果我执行ps-el | grep python
我仍然可以看到生成的所有进程:
0 S 1000 755 1 5 80 0 - 548314 poll_s pts/0 00:00:13 python
0 S 1000 1198 755 4 80 0 - 280172 futex_ pts/0 00:00:09 python
0 S 1000 1201 755 4 80 0 - 280176 futex_ pts/0 00:00:09 python
0 S 1000 1206 755 4 80 0 - 280230 futex_ pts/0 00:00:09 python
0 S 1000 1215 755 4 80 0 - 280198 futex_ pts/0 00:00:09 python
0 S 1000 1216 755 4 80 0 - 281669 futex_ pts/0 00:00:09 python
0 S 1000 1221 755 4 80 0 - 280201 futex_ pts/0 00:00:09 python
0 S 1000 1231 755 4 80 0 - 281668 futex_ pts/0 00:00:09 python
0 S 1000 1240 755 4 80 0 - 280229 futex_ pts/0 00:00:09 python
0 S 1000 1257 755 4 80 0 - 280201 futex_ pts/0 00:00:09 python
我正在Fedora16机器上用Python2.7.2进行测试。任何建议>
问候,,
Bogdan您的线程不是守护进程。它们在主线程退出后继续生存。它们永远被阻止在
挂起的\u操作中。为什么要使用子进程而不是多进程来在多个进程中运行Python代码?旁注:对于这样一个简单的任务,您的代码是复杂的