Difference between revisions of "Known problems"

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== Jupyter notebooks or other programs fail trying to access a /run directory ==
 
  
The default login shell is BASH.  Make sure the following parameter is in your .bashrc file in your home directory, as it prevents a problem where some types of jobs fail when run through the LSF queue. This should be done automatically the first time you log onto DeepSense.
 
 
<code>echo 'unset XDG_RUNTIME_DIR' >> ~/.bashrc</code>
 
 
This line has been added to the default .bashrc file for new users but older user accounts may need this step to be done manually.
 
 
== Cannot Install PyTorch dependencies ==
 
 
UnsatisfiableError: The following specifications were found to be in conflict:
 
  - powerai-pytorch-prereqs=0.4.1_12295.5cb3523
 
 
You may see this error when attempting to install the pytorch dependencies in a local anaconda environment. This error indicates that some of your installed python packages are not compatible with the pytorch prequisites. In particular, we see this error when conda has been updated to version 4.6 (which may sometimes happen when installing the tensorflow dependencies first).
 
 
To resolve this problem, create a new environment with a 4.5.x conda version and then install the pytorch dependencies in that environment.
 
 
== Cannot use Caffe on login node or compute nodes without GPUs ==
 
 
<nowiki>Cuda number of devices: -579579216
 
Current device id: -579579216
 
Current device name:
 
[==========] Running 2207 tests from 293 test cases.
 
[----------] Global test environment set-up.
 
[----------] 9 tests from AccuracyLayerTest/0, where TypeParam = caffe::CPUDevice<float>
 
[ RUN      ] AccuracyLayerTest/0.TestSetup
 
E0206 15:59:26.604874  7990 common.cpp:121] Cannot create Cublas handle. Cublas won't be available.
 
E0206 15:59:26.611477  7990 common.cpp:128] Cannot create Curand generator. Curand won't be available.
 
F0206 15:59:26.611616  7990 syncedmem.cpp:500] Check failed: error == cudaSuccess (30 vs. 0)  unknown error
 
*** Check failure stack trace: ***
 
</nowiki>
 
 
You may see this error when attempting to use Caffe on a node without GPUs or a GPU node without specifically requesting a GPU.
 
 
To resolve this problem, use a GPU node and request a GPU. Caffe cannot run without an available GPU.
 
 
== Cannot see GPUs in an LSF job ==
 
 
$ nvidia-smi
 
No devices were found
 
 
GPUs must be requested with the <code>-gpu -</code> option to bsub. See [[LSF#GPU_Computation]] for more information.
 
 
== Nested anaconda environments may cause strange behaviour ==
 
 
Some users have experienced strange behaviour when activating an anaconda environment within another environment. This may include permission errors, loading incorrect versions of software, or strange conflicts when attempting to install packages. If you encounter problems with a nested anaconda environment then first try deactivating all anaconda environments and activating just the desired environment.
 

Latest revision as of 09:40, 4 December 2020