[error]: OSError: [Errno 24] Too many open files

[yuxiaoyuan0406]

I was installing some packages for conda.

$ conda install conda-build
Traceback (most recent call last):
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1080, in __call__
  File "/home/vip/miniforge-pypy3/site-packages/conda/cli/main.py", line 84, in _main
  File "/home/vip/miniforge-pypy3/site-packages/conda/cli/conda_argparse.py", line 83, in do_call
  File "/home/vip/miniforge-pypy3/site-packages/conda/cli/main_install.py", line 20, in execute
  File "/home/vip/miniforge-pypy3/site-packages/conda/cli/install.py", line 263, in install
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/solve.py", line 117, in solve_for_transaction
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/solve.py", line 158, in solve_for_diff
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/solve.py", line 230, in solve_final_state
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/solve.py", line 1066, in __init__
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/prefix_data.py", line 140, in iter_records
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/prefix_data.py", line 169, in _prefix_records
  File "/home/vip/miniforge-pypy3/site-packages/conda/common/io.py", line 88, in decorated
  File "/home/vip/miniforge-pypy3/site-packages/conda/core/prefix_data.py", line 73, in load
OSError: [Errno 24] Too many open files: b'/home/vip/miniforge-pypy3/envs/ncnn/conda-meta'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/vip/miniforge-pypy3/bin/conda", line 13, in <module>
  File "/home/vip/miniforge-pypy3/site-packages/conda/cli/main.py", line 152, in main
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1372, in conda_exception_handler
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1083, in __call__
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1127, in handle_exception
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1138, in handle_unexpected_exception
  File "/home/vip/miniforge-pypy3/site-packages/conda/exceptions.py", line 1208, in print_unexpected_error_report
OSError: [Errno 24] Too many open files: '/home/vip/miniforge-pypy3/site-packages/conda/cli/main_info.py'

Linux kernel limited open files, default as 1024. To check, run ulimit -a.

$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 13907
max locked memory       (kbytes, -l) 65536
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 13907
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

To change value, run ulimit -n <number>. The number must not be larger than 655350. For example,

$ ulimit -n 65536
$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 13907
max locked memory       (kbytes, -l) 65536
max memory size         (kbytes, -m) unlimited
open files                      (-n) 65536
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 13907
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited