Benchmark fails at the end and do not create json file test result

Why is some occasion the tool seems to fail at the end of the entire test run and does not generate the json output file?

Here is an example of my launcher command:
```
docker run --rm -it --net host -v $(pwd):/opt/inference-benchmarker/results -e "HF_TOKEN=$HF_TOKEN" ghcr.io/huggingface/inference-benchmarker:latest inference-benchmarker --tokenizer-name "$MODEL" --url http://localhost:8080/ --profile chat
```
I run distributed vllm on a 4-node Ray cluster

```
VLLM_HOST_IP=${HEAD_NODE_IP} python3 -m vllm.entrypoints.openai.api_server \
--model ${MODEL_NAME} \
--host 0.0.0.0 \
--port ${VLLM_PORT} \
--tensor-parallel-size 4 \
--pipeline-parallel-size 8 \
--max-model-len 4096 \
--max-num-batched-tokens 8192 \
--max-num-seqs 256 \
--disable-custom-all-reduce \
--distributed-executor-backend ray"
```