[Bug]: RateLimitError breaks agent

[tobitege]

Is there an existing issue for the same bug?

• [X] I have checked the troubleshooting document at https://docs.all-hands.dev/modules/usage/troubleshooting
• [X] I have checked the existing issues.

Describe the bug

Using e.g. OpenRouter, I got a RateLimitError and can't continue afterwards as the agent is "broken" and I need to restart the runtime. This was caught till a recent change to the LLM class and hasn't been addressed yet that the agent stays in an operatable mode.

 Error in agent loop: litellm.RateLimitError: RateLimitError: OpenrouterException -
Traceback (most recent call last):
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/llms/OpenAI/openai.py", line 810, in completion
    raise e
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/llms/OpenAI/openai.py", line 761, in completion
    return convert_to_model_response_object(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/utils.py", line 5903, in convert_to_model_response_object
    raise raised_exception
Exception

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/main.py", line 2072, in completion
    response = openai_chat_completions.completion(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/llms/OpenAI/openai.py", line 820, in completion
    raise OpenAIError(
litellm.llms.OpenAI.openai.OpenAIError

During handling of the above exception, another exception occurred:

  File "/mnt/d/github/workspace/OpenHands/openhands/controller/agent_controller.py", line 422, in _step
    action = self.agent.step(self.state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/mnt/d/github/workspace/OpenHands/openhands/agenthub/codeact_agent/codeact_agent.py", line 207, in step
    response = self.llm.completion(**params)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 336, in wrapped_f
    return copy(f, *args, **kw)
           ^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 475, in __call__
    do = self.iter(retry_state=retry_state)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 376, in iter
    result = action(retry_state)
             ^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 418, in exc_check
    raise retry_exc.reraise()
          ^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 185, in reraise
    raise self.last_attempt.result()
          ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/concurrent/futures/_base.py", line 449, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/tenacity/__init__.py", line 478, in __call__
    result = fn(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^
  File "/mnt/d/github/workspace/OpenHands/openhands/llm/llm.py", line 191, in wrapper
    resp: ModelResponse = completion_unwrapped(*args, **kwargs)
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/utils.py", line 1071, in wrapper
    raise e
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/utils.py", line 959, in wrapper
    result = original_function(*args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/main.py", line 2921, in completion
    raise exception_type(
          ^^^^^^^^^^^^^^^
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/litellm_core_utils/exception_mapping_utils.py", line 2131, in exception_type
    raise e
  File "/home/tobias/.cache/pypoetry/virtualenvs/openhands-ai-Unl_RagG-py3.12/lib/python3.12/site-packages/litellm/litellm_core_utils/exception_mapping_utils.py", line 2038, in exception_type
    raise RateLimitError(
litellm.exceptions.RateLimitError: litellm.RateLimitError: RateLimitError: OpenrouterException -

Current OpenHands version

0.9.8

Installation and Configuration

from source

Model and Agent

No response

Operating System

No response

Reproduction Steps

No response

Logs, Errors, Screenshots, and Additional Context

No response