## 🐛 Bug <!-- A clear and concise description of what the bug is. --> When no Accelerator is defined in Trainer, all_gather function in LightningModule raises NotImplementedError. ## Please reproduce using [the BoringModel and post here](https://colab.research.google.com/drive/1HvWVVTK8j2Nj52qU4Q4YCyzOm0_aLQF3?usp=sharing) <!-- Please paste your BoringModel colab link here. --> https://colab.research.google.com/drive/1VPEIaQ-aN5KVA70VtvGk24AVkTYPvMoY?usp=sharing ### To Reproduce <!-- If you could not reproduce using the BoringModel and still think there's a bug, please post here --> ### Expected behavior <!-- FILL IN --> * All gather should return a value instead. ### Environment * CUDA: - GPU: - Tesla P100-PCIE-16GB - available: True - version: 10.1 * Packages: - numpy: 1.19.4 - pyTorch_debug: True - pyTorch_version: 1.7.0+cu101 - pytorch-lightning: 1.1.2rc1 - tqdm: 4.41.1 * System: - OS: Linux - architecture: - 64bit - - processor: x86_64 - python: 3.6.9 - version: #1 SMP Thu Jul 23 08:00:38 PDT 2020 ### Additional context <!-- Add any other context about the problem here. -->
🐛 Bug
When no Accelerator is defined in Trainer, all_gather function in LightningModule raises NotImplementedError.
Please reproduce using the BoringModel and post here
https://colab.research.google.com/drive/1VPEIaQ-aN5KVA70VtvGk24AVkTYPvMoY?usp=sharing
To Reproduce
Expected behavior
Environment
Additional context