Hi, I recently attempted to run a black hole simulator (https://github.com/rantonels/starless) coded a couple years ago, and ran into a few problems. The one I’m currently stuck on is one concerning a pipe error, and, being fairly new to Python, I can’t seem to fix it.
This is what the console returns:
Traceback (most recent call last):
File "tracer.py", line 925, in <module>
proc.start()
File "C:\Users\artur\AppData\Local\Programs\Python\Python36\lib\multiprocessing\process.py", line 105, in start
self._popen = self._Popen(self)
File "C:\Users\artur\AppData\Local\Programs\Python\Python36\lib\multiprocessing\context.py", line 223, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "C:\Users\artur\AppData\Local\Programs\Python\Python36\lib\multiprocessing\context.py", line 322, in _Popen
return Popen(process_obj)
File "C:\Users\artur\AppData\Local\Programs\Python\Python36\lib\multiprocessing\popen_spawn_win32.py", line 65, in __init__
reduction.dump(process_obj, to_child)
File "C:\Users\artur\AppData\Local\Programs\Python\Python36\lib\multiprocessing\reduction.py", line 60, in dump
ForkingPickler(file, protocol).dump(obj)
BrokenPipeError: [Errno 32] Broken pipe
I’ve tracked down the bug to the following lines:
process_list = []
for i in range(NTHREADS):
p = multiprocessing.Process(target=raytrace_schedule,args=(i,schedules[i],total_colour_buffer_preproc_shared,output.queue))
process_list.append(p)
logger.debug("Starting threads...")
for proc in process_list:
proc.start()
The way I see it, the problem is caused by the multiprocessing library, which must be attempting to write on a closed pipe.
