🐛[BUG]: Some NCCL operations have failed or timed out. Due to the asynchronous nature of CUDA kernels, subsequent GPU operations might run on corrupted/incomplete data.

[wlu1998]

Version

24.07

On which installation method(s) does this occur?

Docker

Describe the issue

when i traingraphcast on a single player with multiple cards，encounter the following error message： [rank3]:[E1016 03:33:45.317536384 ProcessGroupNCCL.cpp:568] [Rank 3] Watchdog caught collective operation timeout: WorkNCCL(SeqNum=50, OpType=ALLREDUCE, NumelIn=1, NumelOut=1, Timeout(ms)=600000) ran for 600011 milliseconds before timing out. [rank3]:[E1016 03:33:45.319844411 ProcessGroupNCCL.cpp:1583] [PG 0 Rank 3] Exception (either an error or timeout) detected by watchdog at work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank3]:[E1016 03:33:45.319862434 ProcessGroupNCCL.cpp:1628] [PG 0 Rank 3] Timeout at NCCL work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank3]:[E1016 03:33:45.319870659 ProcessGroupNCCL.cpp:582] [Rank 3] Some NCCL operations have failed or timed out. Due to the asynchronous nature of CUDA kernels, subsequent GPU operations might run on corrupted/incomplete data. [rank2]:[E1016 03:33:45.380539738 ProcessGroupNCCL.cpp:568] [Rank 2] Watchdog caught collective operation timeout: WorkNCCL(SeqNum=50, OpType=ALLREDUCE, NumelIn=1, NumelOut=1, Timeout(ms)=600000) ran for 600076 milliseconds before timing out. [rank2]:[E1016 03:33:45.382855328 ProcessGroupNCCL.cpp:1583] [PG 0 Rank 2] Exception (either an error or timeout) detected by watchdog at work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank2]:[E1016 03:33:45.382875465 ProcessGroupNCCL.cpp:1628] [PG 0 Rank 2] Timeout at NCCL work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank2]:[E1016 03:33:45.382884031 ProcessGroupNCCL.cpp:582] [Rank 2] Some NCCL operations have failed or timed out. Due to the asynchronous nature of CUDA kernels, subsequent GPU operations might run on corrupted/incomplete data. [rank1]:[E1016 03:33:45.400176821 ProcessGroupNCCL.cpp:568] [Rank 1] Watchdog caught collective operation timeout: WorkNCCL(SeqNum=50, OpType=ALLREDUCE, NumelIn=1, NumelOut=1, Timeout(ms)=600000) ran for 600095 milliseconds before timing out. [rank1]:[E1016 03:33:45.401444623 ProcessGroupNCCL.cpp:1583] [PG 0 Rank 1] Exception (either an error or timeout) detected by watchdog at work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank1]:[E1016 03:33:45.401455763 ProcessGroupNCCL.cpp:1628] [PG 0 Rank 1] Timeout at NCCL work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank1]:[E1016 03:33:45.401460371 ProcessGroupNCCL.cpp:582] [Rank 1] Some NCCL operations have failed or timed out. Due to the asynchronous nature of CUDA kernels, subsequent GPU operations might run on corrupted/incomplete data. [rank0]:[E1016 03:34:00.349118707 ProcessGroupNCCL.cpp:568] [Rank 0] Watchdog caught collective operation timeout: WorkNCCL(SeqNum=50, OpType=ALLTOALL, NumelIn=50507776, NumelOut=50507776, Timeout(ms)=600000) ran for 600018 milliseconds before timing out. [rank0]:[E1016 03:34:00.351482167 ProcessGroupNCCL.cpp:1583] [PG 0 Rank 0] Exception (either an error or timeout) detected by watchdog at work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank0]:[E1016 03:34:00.351502204 ProcessGroupNCCL.cpp:1628] [PG 0 Rank 0] Timeout at NCCL work: 50, last enqueued NCCL work: 50, last completed NCCL work: 49. [rank0]:[E1016 03:34:00.351511431 ProcessGroupNCCL.cpp:582] [Rank 0] Some NCCL operations have failed or timed out. Due to the asynchronous nature of CUDA kernels, subsequent GPU operations might run on corrupted/incomplete data. [rank0]:[E1016 03:52:46.582729551 ProcessGroupNCCL.cpp:1304] [PG 0 Rank 0] First PG on this rank that detected no heartbeat of its watchdog. [rank0]:[E1016 03:52:46.582797502 ProcessGroupNCCL.cpp:1342] [PG 0 Rank 0] Heartbeat monitor timed out! Process will be terminated after dumping debug info. workMetaList.size()=0 [rank0]:[F1016 04:02:46.583303966 ProcessGroupNCCL.cpp:1168] [PG 0 Rank 0] [PG 0 Rank 0] ProcessGroupNCCL's watchdog got stuck for 600 seconds without making progress in monitoring enqueued collectives. This typically indicates a NCCL/CUDA API hang blocking the watchdog, and could be triggered by another thread holding the GIL inside a CUDA api, or other deadlock-prone behaviors.If you suspect the watchdog is not actually stuck and a longer timeout would help, you can either increase the timeout (TORCH_NCCL_HEARTBEAT_TIMEOUT_SEC) to a larger value or disable the heartbeat monitor (TORCH_NCCL_ENABLEMONITORING=0).If either of aforementioned helps, feel free to file an issue to PyTorch about the short timeout or false positive abort; otherwise, please attempt to debug the hang. workMetaList.size() = 0 I added the following code to the environment variables： export NCCL_IB_DISABLE=1 export TORCH_NCCL_ENABLE_MONITORING=0 but it didn't solve the problem

Minimum reproducible example

No response

Relevant log output

No response

Environment details

docker run -dit --restart always --shm-size 64G --ulimit memlock=-1 --ulimit stack=67108864 --runtime nvidia -v /data/modulus:/data/modulus --name modulus --gpus all nvcr.io/nvidia/modulus/modulus:24.07 /bin/bash

[mnabian]

Hi @wlu1998 , have you tried running this on a single GPU? Also, can you post the output of nvidia-smi command here?

[wlu1998]

Due to device limitations, running on a single GPU may result in “out of memory” issues.

[mnabian]

For the default configs, you need a GPU with at least 80GB of memory. Also, GraphCast only supports distributed data parallelism, so your GPU memory requirement does not reduce if you run on multiple GPUs. I suggest to try getting this to work on a single GPU for now. You can reduce the size of the model and the memory overhead by changing some configs like processor_layers, hidden_dim, mesh_level: https://github.com/NVIDIA/modulus/blob/main/examples/weather/graphcast/conf/config.yaml#L29

[wlu1998]

My device is 24*4，so i can only run with with multi-GPU runs. And i want to solve the issue of "Some NCCL operations have failed or timed out". Thank u for the suggest, i will try. Actually, I have tried to modify the annual data to the daily data.

[ram-cherukuri]

@wlu1998 If this issue is resolved, let us know so we can close the issue.

[wlu1998]

@wlu1998 If this issue is resolved, let us know so we can close the issue.

resolved

[NicholasCao]

@wlu1998 If this issue is resolved, let us know so we can close the issue.

resolved

HELP! Could you tell me how to resolve?