[Bug] dspy.utils.exceptions.AdapterParseError: Adapter ChatAdapter failed to parse the LM response.

[rahulsharmavishwakarma]

What happened?

LM Response:

Expected to find output fields in the LM response: [reasoning, answer]

Actual output fields parsed from the LM response: []

| Exception: Traceback (most recent call last):
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/app/pipeline/modules/multihop.py", line 69, in _process_reasoning
result = await self.reasoner.acall(system_prompt=system_prompt, question=question, context=context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/utils/callback.py", line 296, in async_wrapper
return await fn(instance, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/primitives/program.py", line 42, in acall
return await self.aforward(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/predict/chain_of_thought.py", line 41, in aforward
return await self.predict.acall(**kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/predict/predict.py", line 91, in acall
return await super().acall(**kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/utils/callback.py", line 296, in async_wrapper
return await fn(instance, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/primitives/program.py", line 42, in acall
return await self.aforward(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/predict/predict.py", line 159, in aforward
completions = await adapter.acall(lm, lm_kwargs=config, signature=signature, demos=demos, inputs=kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/adapters/base.py", line 65, in acall
return self._call_post_process(outputs, signature)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/adapters/base.py", line 32, in _call_post_process
value = self.parse(signature, output)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/utils/callback.py", line 326, in sync_wrapper
return fn(instance, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/rahulsharma/workspace/zysec-ai/cpod-backend/drag/drag-retriever/.venv/lib/python3.11/site-packages/dspy/adapters/chat_adapter.py", line 179, in parse
raise AdapterParseError(
dspy.utils.exceptions.AdapterParseError: Adapter ChatAdapter failed to parse the LM response.

Steps to reproduce

self.reasoner = dspy.ChainOfThought(MultiHopReasoner)
result = await self.reasoner.acall(system_prompt=system_prompt, question=question, context=context)

DSPy version

2.6.24

[chenmoneygithub]

@rahulsharmavishwakarma Thanks for reporting the issue! Seems like your LM response is empty? Could you try tracing your program by following https://dspy.ai/tutorials/observability/?