Include reference to block or output introducing error

inference/core/entities/responses/workflows.py

@@ -6,6 +6,7 @@
     OperationDescription,
     OperatorDescription,
 )
+from inference.core.workflows.errors import WorkflowBlockError
 from inference.core.workflows.execution_engine.entities.types import Kind
 from inference.core.workflows.execution_engine.introspection.entities import (
     BlockDescription,
@@ -178,3 +179,12 @@ class DescribeInterfaceResponse(BaseModel):
         description="Dictionary mapping name of the kind with OpenAPI 3.0 definitions of underlying objects. "
         "If list is given, entity should be treated as union of types."
     )
+
+
+class WorkflowErrorResponse(BaseModel):
+    message: str
+    error_type: str
+    context: str
+    inner_error_type: str
+    inner_error_message: str
+    blocks_errors: List[WorkflowBlockError]

inference/core/interfaces/http/http_api.py

@@ -14,7 +14,6 @@
 from fastapi.responses import JSONResponse, RedirectResponse, Response
 from fastapi.staticfiles import StaticFiles
 from fastapi_cprofile.profiler import CProfileMiddleware
-from pydantic import BaseModel
 from starlette.convertors import StringConvertor, register_url_convertor
 from starlette.middleware.base import BaseHTTPMiddleware
 
@@ -54,7 +53,6 @@
 from inference.core.entities.requests.trocr import TrOCRInferenceRequest
 from inference.core.entities.requests.workflows import (
     DescribeBlocksRequest,
-    DescribeInterfaceRequest,
     PredefinedWorkflowDescribeInterfaceRequest,
     PredefinedWorkflowInferenceRequest,
     WorkflowInferenceRequest,
@@ -95,6 +93,7 @@
 from inference.core.entities.responses.workflows import (
     DescribeInterfaceResponse,
     ExecutionEngineVersions,
+    WorkflowErrorResponse,
     WorkflowInferenceResponse,
     WorkflowsBlocksDescription,
     WorkflowsBlocksSchemaDescription,
@@ -196,8 +195,6 @@
 from inference.core.managers.metrics import get_container_stats
 from inference.core.managers.prometheus import InferenceInstrumentator
 from inference.core.roboflow_api import (
-    get_roboflow_dataset_type,
-    get_roboflow_instant_model_data,
     get_roboflow_workspace,
     get_workflow_specification,
 )
@@ -215,6 +212,7 @@
     NotSupportedExecutionEngineError,
     ReferenceTypeError,
     RuntimeInputError,
+    WorkflowBlockError,
     WorkflowDefinitionError,
     WorkflowError,
     WorkflowExecutionEngineVersionError,
@@ -323,15 +321,17 @@ async def wrapped_route(*args, **kwargs):
             WorkflowExecutionEngineVersionError,
             NotSupportedExecutionEngineError,
         ) as error:
+            content = WorkflowErrorResponse(
+                message=error.public_message,
+                error_type=error.__class__.__name__,
+                context=error.context,
+                inner_error_type=error.inner_error_type,
+                inner_error_message=str(error.inner_error),
+                blocks_errors=error._blocks_errors,
+            )
             resp = JSONResponse(
                 status_code=400,
-                content={
-                    "message": error.public_message,
-                    "error_type": error.__class__.__name__,
-                    "context": error.context,
-                    "inner_error_type": error.inner_error_type,
-                    "inner_error_message": str(error.inner_error),
-                },
+                content=content.model_dump(),
             )
         except (
             ProcessesManagerInvalidPayload,
@@ -429,15 +429,24 @@ async def wrapped_route(*args, **kwargs):
             )
             traceback.print_exc()
         except WorkflowError as error:
+            content = WorkflowErrorResponse(
+                message=error.public_message,
+                error_type=error.__class__.__name__,
+                context=error.context,
+                inner_error_type=error.inner_error_type,
+                inner_error_message=str(error.inner_error),
+                blocks_errors=[],
+            )
+            if hasattr(error, "_block_id"):
+                content.blocks_errors.append(
+                    WorkflowBlockError(
+                        block_id=error._block_id,
+                        block_type=error._block_type,
+                    )
+                )
             resp = JSONResponse(
                 status_code=500,
-                content={
-                    "message": error.public_message,
-                    "error_type": error.__class__.__name__,
-                    "context": error.context,
-                    "inner_error_type": error.inner_error_type,
-                    "inner_error_message": str(error.inner_error),
-                },
+                content=content.model_dump(),
             )
             traceback.print_exc()
         except (

inference/core/workflows/errors.py

@@ -1,4 +1,12 @@
-from typing import Optional
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+
+class WorkflowBlockError(BaseModel):
+    block_id: str
+    block_type: str
+    property_name: Optional[str] = None
 
 
 class WorkflowError(Exception):
@@ -66,7 +74,14 @@ class WorkflowDefinitionError(WorkflowCompilerError):
 
 
 class WorkflowSyntaxError(WorkflowDefinitionError):
-    pass
+    def __init__(
+        self,
+        *args,
+        blocks_errors: Optional[List[WorkflowBlockError]] = None,
+        **kwargs,
+    ):
+        super().__init__(*args, **kwargs)
+        self._blocks_errors = blocks_errors
 
 
 class DuplicatedNameError(WorkflowDefinitionError):
@@ -122,7 +137,16 @@ class InvalidBlockBehaviourError(WorkflowExecutionEngineError):
 
 
 class StepExecutionError(WorkflowExecutionEngineError):
-    pass
+    def __init__(
+        self,
+        *args,
+        block_id: str,
+        block_type: str,
+        **kwargs,
+    ):
+        super().__init__(*args, **kwargs)
+        self._block_id = block_id
+        self._block_type = block_type
 
 
 class ExecutionEngineRuntimeError(WorkflowExecutionEngineError):

inference/core/workflows/execution_engine/v1/compiler/syntactic_parser.py

@@ -5,7 +5,7 @@
 from typing_extensions import Annotated
 
 from inference.core.entities.responses.workflows import WorkflowsBlocksSchemaDescription
-from inference.core.workflows.errors import WorkflowSyntaxError
+from inference.core.workflows.errors import WorkflowBlockError, WorkflowSyntaxError
 from inference.core.workflows.execution_engine.entities.base import InputType, JsonField
 from inference.core.workflows.execution_engine.introspection.blocks_loader import (
     load_workflow_blocks,
@@ -58,10 +58,27 @@ def parse_workflow_definition(
             outputs=workflow_definition.outputs,
         )
     except pydantic.ValidationError as e:
+        blocks_errors = []
+        for error in e.errors():
+            loc = error["loc"]
+            if loc:
+                section = loc[0]
+                element_name = error["input"].get("name")
+                element_type = error["input"].get("type")
+
+                if section == "steps":
+                    block_error = WorkflowBlockError(
+                        block_id=element_name,
+                        block_type=element_type,
+                        property_name=loc[-1],
+                    )
+                    blocks_errors.append(block_error)
+
         raise WorkflowSyntaxError(
             public_message="Could not parse workflow definition. Details provided in inner error.",
             context="workflow_compilation | workflow_definition_parsing",
             inner_error=e,
+            blocks_errors=blocks_errors,
         ) from e
 
 

inference/core/workflows/execution_engine/v1/executor/core.py

@@ -135,6 +135,8 @@ def safe_execute_step(
     except Exception as error:
         logger.exception(f"Execution of step {step_selector} encountered error.")
         raise StepExecutionError(
+            block_id=step_selector,
+            block_type=workflow.steps[step_selector.split(".")[-1]].manifest.type,
             public_message=f"Error during execution of step: {step_selector}. Details: {error}",
             context="workflow_execution | step_execution",
             inner_error=error,