Fix #2549 : Improve error handling for Ollama connection errors

Co-Authored-By: Joe Moura <joao@crewai.com>
2026-01-08 15:48:29 +00:00 · 2025-04-09 10:31:57 +00:00
8 changed files with 137 additions and 277 deletions
--- a/src/crewai/crew.py
+++ b/src/crewai/crew.py
@@ -16,8 +16,6 @@ from pydantic import (
    field_validator,
    model_validator,
 )
-
-from crewai.llm import LLM
 from pydantic_core import PydanticCustomError

 from crewai.agent import Agent
@@ -1078,32 +1076,18 @@ class Crew(BaseModel):
        self,
        n_iterations: int,
        openai_model_name: Optional[str] = None,
-        llm: Optional[Union[str, LLM]] = None,
        inputs: Optional[Dict[str, Any]] = None,
    ) -> None:
-        """Test and evaluate the Crew with the given inputs for n iterations concurrently using concurrent.futures.
-        
-        Args:
-            n_iterations: Number of iterations to run the test
-            openai_model_name: Name of OpenAI model to use (deprecated, use llm instead)
-            llm: LLM instance or model name to use for evaluation
-            inputs: Optional inputs to pass to the crew
-        """
+        """Test and evaluate the Crew with the given inputs for n iterations concurrently using concurrent.futures."""
        test_crew = self.copy()

-        # Convert string to LLM instance if needed
-        if isinstance(llm, str):
-            llm = LLM(model=llm)
-        elif openai_model_name:
-            llm = LLM(model=openai_model_name)
-        
        self._test_execution_span = test_crew._telemetry.test_execution_span(
            test_crew,
            n_iterations,
            inputs,
-            getattr(llm, "model", openai_model_name),
-        )
-        evaluator = CrewEvaluator(test_crew, llm)
+            openai_model_name,  # type: ignore[arg-type]
+        )  # type: ignore[arg-type]
+        evaluator = CrewEvaluator(test_crew, openai_model_name)  # type: ignore[arg-type]

        for i in range(1, n_iterations + 1):
            evaluator.set_iteration(i)
--- a/src/crewai/llm.py
+++ b/src/crewai/llm.py
@@ -177,6 +177,10 @@ class LLM:
                response = litellm.completion(**params)
                return response["choices"][0]["message"]["content"]
            except Exception as e:
+                if "ollama" in str(self.model).lower() and ("connection refused" in str(e).lower() or "ollamaexception" in str(e).lower()):
+                    from crewai.utilities.exceptions.ollama_connection_exception import OllamaConnectionException
+                    raise OllamaConnectionException(str(e))
+                
                if not LLMContextLengthExceededException(
                    str(e)
                )._is_context_limit_error(str(e)):
--- a/src/crewai/utilities/evaluators/crew_evaluator_handler.py
+++ b/src/crewai/utilities/evaluators/crew_evaluator_handler.py
@@ -1,5 +1,4 @@
 from collections import defaultdict
-from typing import Union

 from pydantic import BaseModel, Field
 from rich.box import HEAVY_EDGE
@@ -7,7 +6,6 @@ from rich.console import Console
 from rich.table import Table

 from crewai.agent import Agent
-from crewai.llm import LLM
 from crewai.task import Task
 from crewai.tasks.task_output import TaskOutput
 from crewai.telemetry import Telemetry
@@ -34,9 +32,9 @@ class CrewEvaluator:
    run_execution_times: defaultdict = defaultdict(list)
    iteration: int = 0

-    def __init__(self, crew, llm: Union[str, LLM]):
+    def __init__(self, crew, openai_model_name: str):
        self.crew = crew
-        self.llm = llm if isinstance(llm, LLM) else LLM(model=llm)
+        self.openai_model_name = openai_model_name
        self._telemetry = Telemetry()
        self._setup_for_evaluating()

@@ -53,7 +51,7 @@ class CrewEvaluator:
            ),
            backstory="Evaluator agent for crew evaluation with precise capabilities to evaluate the performance of the agents in the crew based on the tasks they have performed",
            verbose=False,
-            llm=self.llm,
+            llm=self.openai_model_name,
        )

    def _evaluation_task(
@@ -183,7 +181,7 @@ class CrewEvaluator:
                self.crew,
                evaluation_result.pydantic.quality,
                current_task._execution_time,
-                getattr(self.llm, "model", None),
+                self.openai_model_name,
            )
            self.tasks_scores[self.iteration].append(evaluation_result.pydantic.quality)
            self.run_execution_times[self.iteration].append(
--- a/src/crewai/utilities/exceptions/ollama_connection_exception.py
+++ b/src/crewai/utilities/exceptions/ollama_connection_exception.py
@@ -0,0 +1,18 @@
+class OllamaConnectionException(Exception):
+    """Exception raised when there's a connection issue with Ollama.
+    
+    This typically happens when Ollama is not running or is not accessible
+    at the expected URL.
+    """
+    
+    def __init__(self, error_message: str):
+        self.original_error_message = error_message
+        super().__init__(self._get_error_message(error_message))
+    
+    def _get_error_message(self, error_message: str):
+        return (
+            f"Failed to connect to Ollama. Original error: {error_message}\n"
+            "Please make sure Ollama is installed and running. "
+            "You can install Ollama from https://ollama.com/download and "
+            "start it by running 'ollama serve' in your terminal."
+        )
--- a/tests/cassettes/test_agent_human_input.yaml
+++ b/tests/cassettes/test_agent_human_input.yaml
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--- a/tests/crew_test.py
+++ b/tests/crew_test.py
@@ -14,7 +14,6 @@ from crewai.agent import Agent
 from crewai.agents.cache import CacheHandler
 from crewai.crew import Crew
 from crewai.crews.crew_output import CrewOutput
-from crewai.llm import LLM
 from crewai.memory.contextual.contextual_memory import ContextualMemory
 from crewai.process import Process
 from crewai.task import Task
@@ -1124,7 +1123,7 @@ def test_kickoff_for_each_empty_input():
    assert results == []


-@pytest.mark.vcr(filter_headeruvs=["authorization"])
+@pytest.mark.vcr(filter_headers=["authorization"])
 def test_kickoff_for_each_invalid_input():
    """Tests if kickoff_for_each raises TypeError for invalid input types."""

@@ -2813,11 +2812,10 @@ def test_conditional_should_execute():
@mock.patch("crewai.crew.CrewEvaluator")
@mock.patch("crewai.crew.Crew.copy")
@mock.patch("crewai.crew.Crew.kickoff")
-def test_crew_testing_function_with_openai_model_name(kickoff_mock, copy_mock, crew_evaluator):
-    """Test backward compatibility with openai_model_name parameter."""
+def test_crew_testing_function(kickoff_mock, copy_mock, crew_evaluator):
    task = Task(
-        description="Test task",
-        expected_output="Test output",
+        description="Come up with a list of 5 interesting ideas to explore for an article, then write one amazing paragraph highlight for each idea that showcases how good an article about this topic could be. Return the list of ideas with their paragraph and your notes.",
+        expected_output="5 bullet points with a paragraph for each idea.",
        agent=researcher,
    )

@@ -2826,87 +2824,20 @@ def test_crew_testing_function_with_openai_model_name(kickoff_mock, copy_mock, c
        tasks=[task],
    )

+    # Create a mock for the copied crew
    copy_mock.return_value = crew

    n_iterations = 2
    crew.test(n_iterations, openai_model_name="gpt-4o-mini", inputs={"topic": "AI"})

+    # Ensure kickoff is called on the copied crew
    kickoff_mock.assert_has_calls(
        [mock.call(inputs={"topic": "AI"}), mock.call(inputs={"topic": "AI"})]
    )

    crew_evaluator.assert_has_calls(
        [
-            mock.call(crew, mock.ANY),  # ANY because we convert to LLM instance
-            mock.call().set_iteration(1),
-            mock.call().set_iteration(2),
-            mock.call().print_crew_evaluation_result(),
-        ]
-    )
-
-@mock.patch("crewai.crew.CrewEvaluator")
-@mock.patch("crewai.crew.Crew.copy")
-@mock.patch("crewai.crew.Crew.kickoff")
-def test_crew_testing_function_with_llm_instance(kickoff_mock, copy_mock, crew_evaluator):
-    """Test using LLM instance parameter."""
-    task = Task(
-        description="Test task",
-        expected_output="Test output",
-        agent=researcher,
-    )
-
-    crew = Crew(
-        agents=[researcher],
-        tasks=[task],
-    )
-
-    copy_mock.return_value = crew
-    llm = LLM(model="gpt-4o-mini")
-    
-    n_iterations = 2
-    crew.test(n_iterations, llm=llm, inputs={"topic": "AI"})
-
-    kickoff_mock.assert_has_calls(
-        [mock.call(inputs={"topic": "AI"}), mock.call(inputs={"topic": "AI"})]
-    )
-
-    crew_evaluator.assert_has_calls(
-        [
-            mock.call(crew, llm),
-            mock.call().set_iteration(1),
-            mock.call().set_iteration(2),
-            mock.call().print_crew_evaluation_result(),
-        ]
-    )
-
-@mock.patch("crewai.crew.CrewEvaluator")
-@mock.patch("crewai.crew.Crew.copy")
-@mock.patch("crewai.crew.Crew.kickoff")
-def test_crew_testing_function_with_llm_string(kickoff_mock, copy_mock, crew_evaluator):
-    """Test using LLM string parameter."""
-    task = Task(
-        description="Test task",
-        expected_output="Test output",
-        agent=researcher,
-    )
-
-    crew = Crew(
-        agents=[researcher],
-        tasks=[task],
-    )
-
-    copy_mock.return_value = crew
-    
-    n_iterations = 2
-    crew.test(n_iterations, llm="gpt-4o-mini", inputs={"topic": "AI"})
-
-    kickoff_mock.assert_has_calls(
-        [mock.call(inputs={"topic": "AI"}), mock.call(inputs={"topic": "AI"})]
-    )
-
-    crew_evaluator.assert_has_calls(
-        [
-            mock.call(crew, mock.ANY),  # ANY because we don't care about the LLM instance details
+            mock.call(crew, "gpt-4o-mini"),
            mock.call().set_iteration(1),
            mock.call().set_iteration(2),
            mock.call().print_crew_evaluation_result(),
@@ -3194,4 +3125,4 @@ def test_multimodal_agent_live_image_analysis():
    # Verify we got a meaningful response
    assert isinstance(result.raw, str)
    assert len(result.raw) > 100  # Expecting a detailed analysis
-    assert "error" not in result.raw.lower()  # No error messages in response
+    assert "error" not in result.raw.lower()  # No error messages in response
--- a/tests/test_ollama_connection.py
+++ b/tests/test_ollama_connection.py
@@ -0,0 +1,17 @@
+import pytest
+from unittest.mock import patch, MagicMock
+from crewai.llm import LLM
+from crewai.utilities.exceptions.ollama_connection_exception import OllamaConnectionException
+
+class TestOllamaConnection:
+    def test_ollama_connection_error(self):
+        with patch('litellm.completion') as mock_completion:
+            mock_completion.side_effect = Exception("OllamaException - [Errno 111] Connection refused")
+            
+            llm = LLM(model="ollama/llama3")
+            
+            with pytest.raises(OllamaConnectionException) as exc_info:
+                llm.call([{"role": "user", "content": "Hello"}])
+            
+            assert "Failed to connect to Ollama" in str(exc_info.value)
+            assert "Please make sure Ollama is installed and running" in str(exc_info.value)
--- a/uv.lock
+++ b/uv.lock
@@ -1,18 +1,10 @@
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 requires-python = ">=3.10, <3.13"
 resolution-markers = [
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-    "python_full_version < '3.11' and platform_machine == 'aarch64' and sys_platform == 'linux'",
-    "(python_full_version < '3.11' and platform_machine != 'aarch64' and sys_platform == 'linux') or (python_full_version < '3.11' and sys_platform != 'darwin' and sys_platform != 'linux')",
-    "python_full_version == '3.11.*' and sys_platform == 'darwin'",
-    "python_full_version == '3.11.*' and platform_machine == 'aarch64' and sys_platform == 'linux'",
-    "(python_full_version == '3.11.*' and platform_machine != 'aarch64' and sys_platform == 'linux') or (python_full_version == '3.11.*' and sys_platform != 'darwin' and sys_platform != 'linux')",
-    "python_full_version >= '3.12' and python_full_version < '3.12.4' and sys_platform == 'darwin'",
-    "python_full_version >= '3.12' and python_full_version < '3.12.4' and platform_machine == 'aarch64' and sys_platform == 'linux'",
-    "(python_full_version >= '3.12' and python_full_version < '3.12.4' and platform_machine != 'aarch64' and sys_platform == 'linux') or (python_full_version >= '3.12' and python_full_version < '3.12.4' and sys_platform != 'darwin' and sys_platform != 'linux')",
-    "python_full_version >= '3.12.4' and sys_platform == 'darwin'",
-    "python_full_version >= '3.12.4' and platform_machine == 'aarch64' and sys_platform == 'linux'",
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+    "python_full_version < '3.11'",
+    "python_full_version == '3.11.*'",
+    "python_full_version >= '3.12' and python_full_version < '3.12.4'",
+    "python_full_version >= '3.12.4'",
 ]

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@@ -308,7 +300,7 @@ name = "build"
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+    { name = "colorama", marker = "os_name == 'nt'" },
    { name = "importlib-metadata", marker = "python_full_version < '3.10.2'" },
    { name = "packaging" },
    { name = "pyproject-hooks" },
@@ -543,7 +535,7 @@ name = "click"
 version = "8.1.7"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "colorama", marker = "platform_system == 'Windows'" },
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@@ -650,6 +642,7 @@ tools = [
 [package.dev-dependencies]
 dev = [
    { name = "cairosvg" },
+    { name = "crewai-tools" },
    { name = "mkdocs" },
    { name = "mkdocs-material" },
    { name = "mkdocs-material-extensions" },
@@ -703,6 +696,7 @@ requires-dist = [
 [package.metadata.requires-dev]
 dev = [
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+    { name = "crewai-tools", specifier = ">=0.17.0" },
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@@ -2468,7 +2462,7 @@ version = "1.6.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
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-    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "colorama", marker = "platform_system == 'Windows'" },
    { name = "ghp-import" },
    { name = "jinja2" },
    { name = "markdown" },
@@ -2649,7 +2643,7 @@ version = "2.10.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
    { name = "pygments" },
-    { name = "pywin32", marker = "sys_platform == 'win32'" },
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@@ -2896,7 +2890,7 @@ name = "nvidia-cudnn-cu12"
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 dependencies = [
-    { name = "nvidia-cublas-cu12", marker = "(platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')" },
+    { name = "nvidia-cublas-cu12", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
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@@ -2923,9 +2917,9 @@ name = "nvidia-cusolver-cu12"
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-    { name = "nvidia-cusparse-cu12", marker = "(platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')" },
-    { name = "nvidia-nvjitlink-cu12", marker = "(platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')" },
+    { name = "nvidia-cublas-cu12", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
+    { name = "nvidia-cusparse-cu12", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
+    { name = "nvidia-nvjitlink-cu12", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
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@@ -2936,7 +2930,7 @@ name = "nvidia-cusparse-cu12"
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-    { name = "nvidia-nvjitlink-cu12", marker = "(platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')" },
+    { name = "nvidia-nvjitlink-cu12", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
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 version = "2.10.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "pywin32", marker = "sys_platform == 'win32'" },
+    { name = "pywin32", marker = "platform_system == 'Windows'" },
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 sdist = { url = "https://files.pythonhosted.org/packages/ed/d3/c6c64067759e87af98cc668c1cc75171347d0f1577fab7ca3749134e3cd4/portalocker-2.10.1.tar.gz", hash = "sha256:ef1bf844e878ab08aee7e40184156e1151f228f103aa5c6bd0724cc330960f8f", size = 40891 }
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@@ -5028,19 +5022,19 @@ dependencies = [
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    { name = "jinja2" },
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-    { name = "nvidia-nvtx-cu12", marker = "platform_machine == 'x86_64' and sys_platform == 'linux'" },
+    { name = "nvidia-cublas-cu12", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
+    { name = "nvidia-cuda-cupti-cu12", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
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+    { name = "nvidia-cudnn-cu12", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
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+    { name = "nvidia-cusolver-cu12", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
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+    { name = "nvidia-nvtx-cu12", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
    { name = "sympy" },
-    { name = "triton", marker = "platform_machine == 'x86_64' and sys_platform == 'linux'" },
+    { name = "triton", marker = "platform_machine == 'x86_64' and platform_system == 'Linux'" },
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 version = "4.66.5"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "colorama", marker = "sys_platform == 'win32'" },
+    { name = "colorama", marker = "platform_system == 'Windows'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/58/83/6ba9844a41128c62e810fddddd72473201f3eacde02046066142a2d96cc5/tqdm-4.66.5.tar.gz", hash = "sha256:e1020aef2e5096702d8a025ac7d16b1577279c9d63f8375b63083e9a5f0fcbad", size = 169504 }
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@@ -5130,7 +5124,7 @@ version = "0.27.0"
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+    { name = "cffi", marker = "implementation_name != 'pypy' and os_name == 'nt'" },
    { name = "exceptiongroup", marker = "python_full_version < '3.11'" },
    { name = "idna" },
    { name = "outcome" },
@@ -5161,7 +5155,7 @@ name = "triton"
 version = "3.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "filelock", marker = "(platform_machine != 'aarch64' and sys_platform == 'linux') or (sys_platform != 'darwin' and sys_platform != 'linux')" },
+    { name = "filelock", marker = "(platform_machine != 'aarch64' and platform_system != 'Darwin') or (platform_system != 'Darwin' and platform_system != 'Linux')" },
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