[Usage] json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[ZhangJinian]

Describe the issue

Issue:

I deployed grounddino, and encountered this error when running the segment task example.
Can someone help me?

Command:

python -m llava.serve.controller --host 0.0.0.0 --port 20001

CUDA_VISIBLE_DEVICES=0,1 python -m llava.serve.model_worker --host 0.0.0.0 --controller http://localhost:20001 --port 40000 --worker http://localhost:40000 --model-path /media/lzd/7BF1B57C17F7994E/ubantu/zjn/LLaVA-Plus/llava_plus_v0_7b

python Grounded-Segment-Anything/grounding_dino_worker.py

python -m llava.serve.gradio_web_server_llava_plus --controller http://localhost:20001 --model-list-mode reload```

Log:

2025-07-01 16:01:19 | INFO | stdout | template_name:  vicuna_v1
2025-07-01 16:01:19 | INFO | stdout | Messages： [['USER', ('segment birds in the image, then tell how many birds in it\n<image>', <PIL.Image.Image image mode=RGB size=601x400 at 0x7C253BB9FE50>, 'Crop', <PIL.PngImagePlugin.PngImageFile image mode=RGBA size=601x400 at 0x7C253BB9E4D0>)], ['ASSISTANT', None]]
2025-07-01 16:01:19 | INFO | gradio_web_server | model_name: grounding_dino, worker_addr: http://localhost:40001
2025-07-01 16:01:19 | INFO | gradio_web_server | ==== request ====
{'model': 'grounding_dino', 'prompt': "A chat between a curious user and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the user's questions. USER: <image>\nsegment birds in the image, then tell how many birds in it ASSISTANT:", 'temperature': 0.2, 'top_p': 0.7, 'max_new_tokens': 512, 'stop': '</s>', 'images': "List of 1 images: ['326f83897bb34c5aa9efd8210d2cb935']"}
==== request ====
2025-07-01 16:01:19 | ERROR | stderr | Traceback (most recent call last):
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/routes.py", line 437, in run_predict
2025-07-01 16:01:19 | ERROR | stderr |     output = await app.get_blocks().process_api(
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/blocks.py", line 1352, in process_api
2025-07-01 16:01:19 | ERROR | stderr |     result = await self.call_function(
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/blocks.py", line 1093, in call_function
2025-07-01 16:01:19 | ERROR | stderr |     prediction = await utils.async_iteration(iterator)
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/utils.py", line 341, in async_iteration
2025-07-01 16:01:19 | ERROR | stderr |     return await iterator.__anext__()
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/utils.py", line 334, in __anext__
2025-07-01 16:01:19 | ERROR | stderr |     return await anyio.to_thread.run_sync(
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/anyio/to_thread.py", line 56, in run_sync
2025-07-01 16:01:19 | ERROR | stderr |     return await get_async_backend().run_sync_in_worker_thread(
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2470, in run_sync_in_worker_thread
2025-07-01 16:01:19 | ERROR | stderr |     return await future
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 967, in run
2025-07-01 16:01:19 | ERROR | stderr |     result = context.run(func, *args)
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/site-packages/gradio/utils.py", line 317, in run_sync_iterator_async
2025-07-01 16:01:19 | ERROR | stderr |     return next(iterator)
2025-07-01 16:01:19 | ERROR | stderr |   File "/media/lzd/7BF1B57C17F7994E/ubantu/zjn/LLaVA-Plus/llava/serve/gradio_web_server_llava_plus.py", line 467, in http_bot
2025-07-01 16:01:19 | ERROR | stderr |     data = json.loads(chunk.decode())
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/json/__init__.py", line 346, in loads
2025-07-01 16:01:19 | ERROR | stderr |     return _default_decoder.decode(s)
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/json/decoder.py", line 337, in decode
2025-07-01 16:01:19 | ERROR | stderr |     obj, end = self.raw_decode(s, idx=_w(s, 0).end())
2025-07-01 16:01:19 | ERROR | stderr |   File "/home/lzd/anaconda3/envs/llavaplus/lib/python3.10/json/decoder.py", line 355, in raw_decode
2025-07-01 16:01:19 | ERROR | stderr |     raise JSONDecodeError("Expecting value", s, err.value) from None
2025-07-01 16:01:19 | ERROR | stderr | json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Screenshots: