I have something like this
outputs = Parallel(n_jobs=12, verbose=10)(delayed(_process_article)(article, config) for article in data)
Case 1: Run on ubuntu with 80 cores:
CPU(s): 80
Thread(s) per core: 2
Core(s) per socket: 20
Socket(s): 2
There are a total of 90,000 tasks. At around 67k it fails and is terminated.
joblib.externals.loky.process_executor.BrokenProcessPool: A process in the executor was terminated abruptly, the pool is not usable anymore.
When I monitor the top at 67k I see a sharp fall in the memory
top - 11:40:25 up 2 days, 18:35, 4 users, load average: 7.09, 7.56, 7.13
Tasks: 32 total, 3 running, 29 sleeping, 0 stopped, 0 zombie
%Cpu(s): 7.6 us, 2.6 sy, 0.0 ni, 89.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 33554432 total, 40 free, 33520996 used, 33396 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 40 avail Mem
Case 2: Mac with 8 cores
hw.physicalcpu: 4
hw.logicalcpu: 8
But on the mac it is much much slower .. And surprisingly it does not get killed at 67k..
Additionally, I reduced the parallelism (in case 1) to 2,4 and it still fails :( Why is this happening? Has anyone faced this issue before and has a fix?
Note: when I run for 50,000 tasks it runs well and does not give any problems.
Thank you!
Got a machine with an increased memory of 128GB and that solved the problem!