feat: log warning on DPS errored notification

data-protocols/data-plane-signaling/data-plane-signaling-core/src/main/java/org/eclipse/edc/signaling/DataPlaneSignalingApiExtension.java

@@ -81,7 +81,8 @@ public void initialize(ServiceExtensionContext context) {
 
         webService.registerResource(ApiContext.MANAGEMENT, new DataPlaneRegistrationApiV4Controller(dataPlaneSelectorService));
         webService.registerResource(ApiContext.SIGNALING, new DataPlaneTransferAuthorizationFilter(signalingAuthorizationRegistry, transferProcessService, dataPlaneSelectorService));
-        webService.registerResource(ApiContext.SIGNALING, new DataPlaneTransferApiController(transferProcessService, typeTransformerRegistry));
+        webService.registerResource(ApiContext.SIGNALING, new DataPlaneTransferApiController(transferProcessService,
+                typeTransformerRegistry, context.getMonitor().withPrefix("DataPlaneTransferApiController")));
 
         try (var versionContent = getClass().getClassLoader().getResourceAsStream(API_VERSION_JSON_FILE)) {
             apiVersionService.registerVersionInfo(ApiContext.SIGNALING, versionContent);

data-protocols/data-plane-signaling/data-plane-signaling-core/src/main/java/org/eclipse/edc/signaling/port/api/DataPlaneTransferApi.java

@@ -64,5 +64,15 @@ public interface DataPlaneTransferApi {
     )
     Response completed(String transferId);
 
+    @Operation(
+            method = POST,
+            description = "Notify an errored transfer",
+            responses = {
+                    @ApiResponse(responseCode = "200", description = "Errored notification delivered correctly"),
+                    @ApiResponse(responseCode = "404", description = "Transfer process does not exist",
+                            content = @Content(array = @ArraySchema(schema = @Schema(implementation = ApiCoreSchema.ApiErrorDetailSchema.class))))
+            }
+    )
+    Response errored(String transferId, DataFlowStatusMessage message);
 
 }

data-protocols/data-plane-signaling/data-plane-signaling-core/src/main/java/org/eclipse/edc/signaling/port/api/DataPlaneTransferApiController.java

@@ -28,6 +28,7 @@
 import org.eclipse.edc.signaling.domain.DataFlowPrepareMessage;
 import org.eclipse.edc.signaling.domain.DataFlowStartMessage;
 import org.eclipse.edc.signaling.domain.DataFlowStatusMessage;
+import org.eclipse.edc.spi.monitor.Monitor;
 import org.eclipse.edc.spi.result.ServiceResult;
 import org.eclipse.edc.transform.spi.TypeTransformerRegistry;
 
@@ -42,10 +43,12 @@ public class DataPlaneTransferApiController implements DataPlaneTransferApi {
 
     private final TransferProcessService transferProcessService;
     private final TypeTransformerRegistry typeTransformerRegistry;
+    private final Monitor monitor;
 
-    public DataPlaneTransferApiController(TransferProcessService transferProcessService, TypeTransformerRegistry typeTransformerRegistry) {
+    public DataPlaneTransferApiController(TransferProcessService transferProcessService, TypeTransformerRegistry typeTransformerRegistry, Monitor monitor) {
         this.transferProcessService = transferProcessService;
         this.typeTransformerRegistry = typeTransformerRegistry;
+        this.monitor = monitor;
     }
 
     @Path("/{transferId}/dataflow/prepared")
@@ -84,4 +87,15 @@ public Response completed(@PathParam("transferId") String transferId) {
         return Response.ok().build();
     }
 
+    @Path("/{transferId}/dataflow/errored")
+    @POST
+    @Override
+    public Response errored(@PathParam("transferId") String transferId, DataFlowStatusMessage message) {
+        monitor.warning("Errored DataFlow notification received about TransferProcess %s: %s".formatted(transferId, message.getError()));
+        return Response.ok().build();
+    }
+
+
+
+
 }

data-protocols/data-plane-signaling/data-plane-signaling-core/src/test/java/org/eclipse/edc/signaling/port/api/DataPlaneTransferApiControllerTest.java

@@ -39,6 +39,7 @@
 import static java.util.Collections.emptyMap;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.ArgumentMatchers.contains;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
@@ -331,9 +332,35 @@ void shouldReturnError_whenServiceCallFails() {
         }
     }
 
+    @Nested
+    class Errored {
+        @BeforeEach
+        void setUp() {
+            setupValidAuthorization();
+        }
+
+        @Test
+        void shouldLogWarning() {
+            var transferId = UUID.randomUUID().toString();
+            when(transferProcessService.complete(any())).thenReturn(ServiceResult.success());
+            var message = DataFlowStatusMessage.Builder.newInstance().error("data-plane error").build();
+
+            given()
+                    .port(port)
+                    .contentType(ContentType.JSON)
+                    .body(message)
+                    .post("/transfers/{transferId}/dataflow/errored", transferId)
+                    .then()
+                    .log().ifValidationFails()
+                    .statusCode(200);
+
+            verify(monitor).warning(contains("data-plane error"));
+        }
+    }
+
     @Override
     protected Object controller() {
-        return new DataPlaneTransferApiController(transferProcessService, typeTransformerRegistry);
+        return new DataPlaneTransferApiController(transferProcessService, typeTransformerRegistry, monitor);
     }
 
     @Override

data-protocols/data-plane-signaling/src/main/resources/signaling-api-version.json

@@ -2,6 +2,6 @@
   {
     "version": "1.0.0-alpha",
     "urlPath": "/v1",
-    "lastUpdated": "2026-04-13T14:00:01Z"
+    "lastUpdated": "2026-04-15T14:00:01Z"
   }
 ]