Add MethodExecutionFailedEvent to handle flow method execution failures

- Introduce new MethodExecutionFailedEvent in flow_events module
- Update Flow class to catch and emit method execution failures
- Add event listener for method execution failure events
- Update event-related imports to include new event type
- Enhance test coverage for method execution failure handling

src/crewai/flow/flow.py

@@ -31,6 +31,7 @@ from crewai.utilities.events import (
     MethodExecutionStartedEvent,
 )
 from crewai.utilities.events.event_bus import event_bus
+from crewai.utilities.events.flow_events import MethodExecutionFailedEvent
 from crewai.utilities.printer import Printer
 
 logger = logging.getLogger(__name__)
@@ -808,40 +809,53 @@ class Flow(Generic[T], metaclass=FlowMeta):
     async def _execute_method(
         self, method_name: str, method: Callable, *args: Any, **kwargs: Any
     ) -> Any:
-        dumped_params = {f"_{i}": arg for i, arg in enumerate(args)} | (kwargs or {})
-        event_bus.emit(
-            self,
-            MethodExecutionStartedEvent(
-                type="method_execution_started",
-                method_name=method_name,
-                flow_name=self.__class__.__name__,
-                params=dumped_params,
-                state=self._copy_state(),
-            ),
-        )
+        try:
+            dumped_params = {f"_{i}": arg for i, arg in enumerate(args)} | (kwargs or {})
+            event_bus.emit(
+                self,
+                MethodExecutionStartedEvent(
+                    type="method_execution_started",
+                    method_name=method_name,
+                    flow_name=self.__class__.__name__,
+                    params=dumped_params,
+                    state=self._copy_state(),
+                ),
+            )
 
-        result = (
-            await method(*args, **kwargs)
-            if asyncio.iscoroutinefunction(method)
-            else method(*args, **kwargs)
-        )
-        self._method_outputs.append(result)
-        self._method_execution_counts[method_name] = (
-            self._method_execution_counts.get(method_name, 0) + 1
-        )
+            
+            result = (
+                await method(*args, **kwargs)
+                if asyncio.iscoroutinefunction(method)
+                else method(*args, **kwargs)
+            )
+        
+            self._method_outputs.append(result)
+            self._method_execution_counts[method_name] = (
+                self._method_execution_counts.get(method_name, 0) + 1
+            )
 
-        event_bus.emit(
-            self,
-            MethodExecutionFinishedEvent(
-                type="method_execution_finished",
-                method_name=method_name,
-                flow_name=self.__class__.__name__,
-                state=self._copy_state(),
-                result=result,
-            ),
-        )
+            event_bus.emit(
+                self,
+                MethodExecutionFinishedEvent(
+                    type="method_execution_finished",
+                    method_name=method_name,
+                    flow_name=self.__class__.__name__,
+                    state=self._copy_state(),
+                    result=result,
+                ),
+            )
 
-        return result
+            return result
+        except Exception as e:
+            event_bus.emit(
+                self,
+                MethodExecutionFailedEvent(
+                    type="method_execution_failed",
+                    method_name=method_name,
+                    flow_name=self.__class__.__name__,
+                    error=e,
+                ),
+            )
 
     async def _execute_listeners(self, trigger_method: str, result: Any) -> None:
         """

src/crewai/utilities/events/__init__.py

@@ -21,6 +21,7 @@ from .flow_events import (
     FlowFinishedEvent,
     MethodExecutionStartedEvent,
     MethodExecutionFinishedEvent,
+    MethodExecutionFailedEvent,
 )
 from .event_bus import EventBus, event_bus
 from .tool_usage_events import ToolUsageFinishedEvent, ToolUsageErrorEvent

src/crewai/utilities/events/event_listener.py

@@ -20,6 +20,7 @@ from .flow_events import (
     FlowCreatedEvent,
     FlowFinishedEvent,
     FlowStartedEvent,
+    MethodExecutionFailedEvent,
     MethodExecutionFinishedEvent,
     MethodExecutionStartedEvent,
 )
@@ -125,9 +126,8 @@ class EventListener(BaseEventListener):
             source._execution_span = self._telemetry.task_started(
                 crew=source.agent.crew, task=source
             )
-            context = event.context
             self.logger.log(
-                f"📋 Task started: {source.description} Context: {context}",
+                f"📋 Task started: {source.description}",
                 event.timestamp,
                 color=self.color,
             )
@@ -139,7 +139,7 @@ class EventListener(BaseEventListener):
             if source._execution_span:
                 self._telemetry.task_ended(source._execution_span, source, source.agent.crew)
             self.logger.log(
-                f"📋 Task completed: {source.description}",
+                f"✅ Task completed: {source.description}",
                 event.timestamp,
                 color=self.color,
             )
@@ -169,7 +169,7 @@ class EventListener(BaseEventListener):
         @event_bus.on(AgentExecutionCompletedEvent)
         def on_agent_execution_completed(source, event: AgentExecutionCompletedEvent):
             self.logger.log(
-                f"👍 Agent '{event.agent.role}' completed task",
+                f"✅ Agent '{event.agent.role}' completed task",
                 event.timestamp,
                 color=self.color,
             )
@@ -212,6 +212,15 @@ class EventListener(BaseEventListener):
                 color=self.color,
             )
 
+        @event_bus.on(MethodExecutionFailedEvent)
+        def on_method_execution_failed(source, event: MethodExecutionFailedEvent):
+            self.logger.log(
+                f"❌ Flow Method Failed: '{event.method_name}'",
+                event.timestamp,
+                color=self.color,
+            )
+
+
         @event_bus.on(MethodExecutionFinishedEvent)
         def on_method_execution_finished(source, event: MethodExecutionFinishedEvent):
             self.logger.log(

src/crewai/utilities/events/event_types.py

@@ -21,6 +21,7 @@ from .flow_events import (
     FlowStartedEvent,
     MethodExecutionFinishedEvent,
     MethodExecutionStartedEvent,
+    MethodExecutionFailedEvent,
 )
 from .task_events import (
     TaskCompletedEvent,
@@ -48,6 +49,7 @@ EventTypes = Union[
     FlowFinishedEvent,
     MethodExecutionStartedEvent,
     MethodExecutionFinishedEvent,
+    MethodExecutionFailedEvent,
     AgentExecutionErrorEvent,
     ToolUsageFinishedEvent,
     ToolUsageErrorEvent,

src/crewai/utilities/events/flow_events.py

@@ -45,6 +45,15 @@ class MethodExecutionFinishedEvent(FlowEvent):
     result: Any = None
     state: Union[Dict[str, Any], BaseModel]
     type: str = "method_execution_finished"
+    
+
+class MethodExecutionFailedEvent(FlowEvent):
+    """Event emitted when a flow method fails execution"""
+
+    flow_name: str
+    method_name: str
+    error: Any
+    type: str = "method_execution_failed"
 
 
 class FlowFinishedEvent(FlowEvent):

tests/utilities/test_events.py

@@ -26,6 +26,7 @@ from crewai.utilities.events.flow_events import (
     FlowCreatedEvent,
     FlowFinishedEvent,
     FlowStartedEvent,
+    MethodExecutionFailedEvent,
     MethodExecutionStartedEvent,
 )
 from crewai.utilities.events.task_events import (
@@ -468,3 +469,27 @@ def test_flow_emits_created_event():
     assert len(received_events) == 1
     assert received_events[0].flow_name == "TestFlow"
     assert received_events[0].type == "flow_created"
+
+
+def test_flow_emits_method_execution_failed_event():
+    received_events = []
+    error = Exception("Simulated method failure")
+
+    @event_bus.on(MethodExecutionFailedEvent)
+    def handle_method_failed(source, event):
+        received_events.append(event)
+
+    class TestFlow(Flow[dict]):
+        @start()
+        def begin(self):
+            raise error
+
+    flow = TestFlow()
+    # with pytest.raises(Exception):
+    flow.kickoff()
+
+    assert len(received_events) == 1
+    assert received_events[0].method_name == "begin"
+    assert received_events[0].flow_name == "TestFlow"
+    assert received_events[0].type == "method_execution_failed"
+    assert received_events[0].error == error