A800通信问题。两张卡，一张用于启动vllm，一张用于训练，无法连接到vllm，是否存在通信问题？

My rollout script: CUDA_VISIBLE_DEVICES=1 NCCL_P2P_DISABLE=1 NCCL_IB_DISABLE=1 NCCL_SOCKET_IFNAME=lo
swift rollout
--model /data/ms-swift-main/output_box/v0-20260325-102319/checkpoint-1830
--vllm_data_parallel_size 1
--vllm_gpu_memory_utilization 0.9
--model_type qwen3_vl
--vllm_max_model_len 8192 My training script: CUDA_VISIBLE_DEVICES=1 NCCL_P2P_DISABLE=1 NCCL_IB_DISABLE=1 NCCL_SOCKET_IFNAME=lo
export WANDB_API_KEY=your_wandb_api_key
export PYTORCH_CUDA_ALLOC_CONF='expandable_segments:True'
export MAX_PIXELS=602112
export USE_FLASH_ATTENTION=1
torchrun
--nproc_per_node=1
--master_port=29501
-m swift.cli.rlhf
--rlhf_type grpo
--model /data/ms-swift-main/output_box/v0-20260325-102319/checkpoint-1830
--external_plugins /data/ms-swift-main/examples/train/grpo/plugin/plugin_iou.py
--system '/data/ms-swift-main/examples/train/grpo/plugin/prompt.txt'
--output_dir /data/ms-swift-main/output_rl
--dataset '/data/ms-swift-main/dataset/sft_0130/53_rl.json'
--reward_funcs external_box_iou_reward
--train_type full
--freeze_vit False
--torch_dtype bfloat16
--learning_rate 1e-6
--max_completion_length 2048
--num_train_epochs 2
--num_iterations 2
--per_device_train_batch_size 4
--per_device_eval_batch_size 4
--gradient_accumulation_steps 4
--num_generations 4
--async_generate true
--beta 0.001
--warmup_ratio 0.01
--temperature 1.0
--deepspeed zero2
--save_strategy 'steps'
--eval_strategy 'steps'
--eval_steps 1000
--save_steps 160
--save_total_limit 2
--dataloader_num_workers 2
--load_from_cache_file true
--logging_steps 1
--log_completions true
--report_to tensorboard swanlab
--use_vllm true
--vllm_mode server
--vllm_server_host 127.0.0.1
--vllm_server_port 8000
# --target_modules all-linear
# --lora_rank 64
# --lora_alpha 128 My error: INFO: Application startup complete. INFO: Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit) INFO: 127.0.0.1:34576 - "GET /health/ HTTP/1.1" 200 OK INFO: 127.0.0.1:34582 - "POST /close_communicator/ HTTP/1.1" 200 OK INFO: 127.0.0.1:34582 - "GET /get_world_size/ HTTP/1.1" 200 OK INFO: 127.0.0.1:34582 - "POST /init_communicator/ HTTP/1.1" 200 OK (EngineCore_DP0 pid=884) INFO 04-09 10:41:31 [init.py:1384] Found nccl from library libnccl.so.2 (EngineCore_DP0 pid=884) INFO 04-09 10:41:31 [pynccl.py:103] vLLM is using nccl==2.27.3 (EngineCore_DP0 pid=884) ERROR 04-09 10:41:31 [core.py:780]