On 26/03/2014 5:25pm, Guido van Rossum wrote:
- Looks like the signal handler is somehow inherited by the subprocess
created for the process pool?
It looks like ProcessPoolExecutor creates its workers lazily, so after
you have changed the signal handlers for the main process. The workers
are created using multiprocessing, which uses fork on Unix (at least by
default), so they inherit the signal handlers.
You might try submitting a dummy task before modifying the signal
handlers (although that will not help much if the workers have to be
restarted).
In Python 3.4 you might try using
multiprocessing.set_start_method('spawn')
or
multiprocessing.set_start_method('forkserver')
This hopefully prevents the workers from inheriting anything troublesome
from the main process.
-- Richard
