When hot-loading a large model, a segmentation fault will occur.

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Description

I start triton server with '--model-control-mode poll'. Segmentation fault occurs when modifying the model directory.

Reproduced Steps

1.CUDA_VISIBLE_DEVICES=3,4,5,6 /opt/tritonserver/bin/tritonserver  --model-repository=/ft_workspace/all_models/t5/ --http-port 8008 --model-control-mode poll
2.Navigate to the directory containing the config.pbtxt file, and exec 'cp -rf 1 2'
3.client send request and segmentation fault will happen

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