Hi,
I noticed recently that the long running check to see if the task is already running before running it doesn't seem to work. I ended up with a bunch of tasks running in my scheduled tasks since my task runs infinitely.
What's the fix? Is anyone experiencing this?
lock_socket = None # we want to keep the socket open until the very end of
# our script so we use a global variable to avoid going
# out of scope and being garbage-collected
def is_lock_free():
global lock_socket
lock_socket = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)
try:
lock_id = "name.script" # this should be unique. using your username as a prefix is a convention
lock_socket.bind('\0' + lock_id)
print("acquired")
logging.debug("Acquired lock %r" % (lock_id,))
return True
except socket.error:
# socket already locked, task must already be running
print("failed")
logging.info("Failed to acquire lock %r" % (lock_id,))
return False
if not is_lock_free():
sys.exit()
giles
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PythonAnywhere staff
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