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Posted to discuss-archive@mxnet.apache.org by Talha Anwar via MXNet Forum <mx...@discoursemail.com.INVALID> on 2021/05/23 09:58:53 UTC
[MXNet Forum] OSError: libnccl.so.2: cannot open shared object file:
No such file or directory
Package is installed as follow
```
!python3 -m pip install -U pip
!python3 -m pip install -U setuptools wheel
!python3 -m pip install -U "mxnet_cu110<2.0.0"
```
nvcc --version output
```
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2020 NVIDIA Corporation
Built on Wed_Jul_22_19:09:09_PDT_2020
Cuda compilation tools, release 11.0, V11.0.221
Build cuda_11.0_bu.TC445_37.28845127_0
```
Ubunto version
```
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.5 LTS"
NAME="Ubuntu"
VERSION="18.04.5 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.5 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
```
Error
```
OSErrorTraceback (most recent call last)
<ipython-input-1-1eadd2d362f9> in <module>
----> 1 import mxnet
/usr/local/lib/python3.6/dist-packages/mxnet/__init__.py in <module>
21 """MXNet: a concise, fast and flexible framework for deep learning."""
22
---> 23 from .context import Context, current_context, cpu, gpu, cpu_pinned
24 from . import engine, error
25 from .base import MXNetError
/usr/local/lib/python3.6/dist-packages/mxnet/context.py in <module>
21 import warnings
22 import ctypes
---> 23 from .base import classproperty, with_metaclass, _MXClassPropertyMetaClass
24 from .base import _LIB
25 from .base import check_call
/usr/local/lib/python3.6/dist-packages/mxnet/base.py in <module>
349 __version__ = libinfo.__version__
350 # library instance of mxnet
--> 351 _LIB = _load_lib()
352
353 # type definitions
/usr/local/lib/python3.6/dist-packages/mxnet/base.py in _load_lib()
340 """Load library by searching possible path."""
341 lib_path = libinfo.find_lib_path()
--> 342 lib = ctypes.CDLL(lib_path[0], ctypes.RTLD_LOCAL)
343 # DMatrix functions
344 lib.MXGetLastError.restype = ctypes.c_char_p
/usr/lib/python3.6/ctypes/__init__.py in __init__(self, name, mode, handle, use_errno, use_last_error)
346
347 if handle is None:
--> 348 self._handle = _dlopen(self._name, mode)
349 else:
350 self._handle = handle
OSError: libnccl.so.2: cannot open shared object file: No such file or directory
```
I also installed nccl as follow
```
* $ wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin
* $ sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600
* $ sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/7fa2af80.pub
* $ sudo add-apt-repository "deb http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/ /"
* $ sudo apt-get update
---
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[MXNet Forum] OSError: libnccl.so.2: cannot open shared object file:
No such file or directory
Posted by Triston via MXNet Forum <mx...@discoursemail.com.INVALID>.
Glad to hear that it worked for you. Thanks for the feedback.
---
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[MXNet Forum] OSError: libnccl.so.2: cannot open shared object file:
No such file or directory
Posted by Neo Zhou via MXNet Forum <mx...@discoursemail.com.INVALID>.
After installing nccl as talhaanwarch did, and then doing `sudo apt install libnccl2`, this solved the issue for me.
---
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[MXNet Forum] OSError: libnccl.so.2: cannot open shared object file:
No such file or directory
Posted by Triston via MXNet Forum <mx...@discoursemail.com.INVALID>.
Did you install NCCL?
```
sudo apt install libnccl2
---
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