[Bug] Multi-node BUG

[sitabulaixizawaluduo]

Checklist

• 1. I have searched related issues but cannot get the expected help.
• 2. The bug has not been fixed in the latest version.
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Describe the bug

When I use two H800 machines to push deepseekv3, when there is a problem with a node-rank 1 machine, like NCCL WatchDog Timeout, the process on node-rank 0 will not exit immediately. What is the reason for this?

Reproduction

python3 -m sglang.launch_server --model-path DeepSeek-V3 --tp-size 16 --nnodes 2 --node-rank 0 --trust-remote-code --dist-init-addr {my
k8s pod ip} --host 0.0.0.0 --port 8000
python3 -m sglang.launch_server --model-path DeepSeek-V3 --tp-size 16 --nnodes 2 --node-rank 1 --trust-remote-code --dist-init-addr {my
k8s pod ip} --host 0.0.0.0 --port 8000

Environment

Python: 3.10.16 (main, Dec 4 2024, 08:53:37) [GCC 9.4.0]
CUDA available: True
GPU 0,1,2,3,4,5,6,7: NVIDIA H800
GPU 0,1,2,3,4,5,6,7 Compute Capability: 9.0
CUDA_HOME: /usr/local/cuda
NVCC: Cuda compilation tools, release 12.4, V12.4.131
CUDA Driver Version: 550.90.07
PyTorch: 2.5.1+cu124
sglang: 0.4.1.post7
flashinfer: 0.1.6+cu124torch2.4
triton: 3.1.0
transformers: 4.48.0
torchao: 0.8.0
numpy: 1.26.4
aiohttp: 3.11.11
fastapi: 0.115.6
hf_transfer: 0.1.9
huggingface_hub: 0.27.1
interegular: 0.3.3
modelscope: 1.22.3
orjson: 3.10.15
packaging: 24.2
psutil: 6.1.1
pydantic: 2.10.5
multipart: 0.0.20
zmq: 26.2.0
uvicorn: 0.34.0
uvloop: 0.21.0
vllm: 0.6.4.post1
openai: 1.59.8
anthropic: 0.43.1
decord: 0.6.0
NVIDIA Topology:
GPU0 GPU1 GPU2 GPU3 GPU4 GPU5 GPU6 GPU7 NIC0 NIC1 NIC2 NIC3 NIC4 NIC5 NIC6 NIC7 NIC8 CPU Affinity NUMA Affinity GPU NUMA ID
GPU0 X NV8 NV8 NV8 NV8 NV8 NV8 NV8 PIX NODE NODE NODE SYS SYS SYS SYS NODE 0-55,112-167 N/A
GPU1 NV8 X NV8 NV8 NV8 NV8 NV8 NV8 NODE PIX NODE NODE SYS SYS SYS SYS NODE 0-55,112-167 N/A
GPU2 NV8 NV8 X NV8 NV8 NV8 NV8 NV8 NODE NODE PIX NODE SYS SYS SYS SYS NODE 0-55,112-167 N/A
GPU3 NV8 NV8 NV8 X NV8 NV8 NV8 NV8 NODE NODE NODE PIX SYS SYS SYS SYS NODE 0-55,112-167 N/A
GPU4 NV8 NV8 NV8 NV8 X NV8 NV8 NV8 SYS SYS SYS SYS PIX NODE NODE NODE SYS 56-111,168-223 N/A
GPU5 NV8 NV8 NV8 NV8 NV8 X NV8 NV8 SYS SYS SYS SYS NODE PIX NODE NODE SYS 56-111,168-223 N/A
GPU6 NV8 NV8 NV8 NV8 NV8 NV8 X NV8 SYS SYS SYS SYS NODE NODE PIX NODE SYS 56-111,168-223 N/A
GPU7 NV8 NV8 NV8 NV8 NV8 NV8 NV8 X SYS SYS SYS SYS NODE NODE NODE PIX SYS 56-111,168-223 N/A
NIC0 PIX NODE NODE NODE SYS SYS SYS SYS X NODE NODE NODE SYS SYS SYS SYS NODE
NIC1 NODE PIX NODE NODE SYS SYS SYS SYS NODE X NODE NODE SYS SYS SYS SYS NODE
NIC2 NODE NODE PIX NODE SYS SYS SYS SYS NODE NODE X NODE SYS SYS SYS SYS NODE
NIC3 NODE NODE NODE PIX SYS SYS SYS SYS NODE NODE NODE X SYS SYS SYS SYS NODE
NIC4 SYS SYS SYS SYS PIX NODE NODE NODE SYS SYS SYS SYS X NODE NODE NODE SYS
NIC5 SYS SYS SYS SYS NODE PIX NODE NODE SYS SYS SYS SYS NODE X NODE NODE SYS
NIC6 SYS SYS SYS SYS NODE NODE PIX NODE SYS SYS SYS SYS NODE NODE X NODE SYS
NIC7 SYS SYS SYS SYS NODE NODE NODE PIX SYS SYS SYS SYS NODE NODE NODE X SYS
NIC8 NODE NODE NODE NODE SYS SYS SYS SYS NODE NODE NODE NODE SYS SYS SYS SYS X

Legend:

X = Self
SYS = Connection traversing PCIe as well as the SMP interconnect between NUMA nodes (e.g., QPI/UPI)
NODE = Connection traversing PCIe as well as the interconnect between PCIe Host Bridges within a NUMA node
PHB = Connection traversing PCIe as well as a PCIe Host Bridge (typically the CPU)
PXB = Connection traversing multiple PCIe bridges (without traversing the PCIe Host Bridge)
PIX = Connection traversing at most a single PCIe bridge
NV# = Connection traversing a bonded set of # NVLinks

NIC Legend:

NIC0: mlx5_0
NIC1: mlx5_3
NIC2: mlx5_4
NIC3: mlx5_5
NIC4: mlx5_6
NIC5: mlx5_7
NIC6: mlx5_8
NIC7: mlx5_9
NIC8: mlx5_bond_0

ulimit soft: 10485760

[zhaochenyang20]

Could you try to test the connectivity of your two nodes? Also, could you provide the error information in detail?