fix: Querying data unreliable with custom backend

src/components/Home/RunSection/RunSection.tsx

@@ -75,7 +75,7 @@ export const RunSection = ({ onEmptyList }: { onEmptyList?: () => void }) => {
 
   const { data, isLoading, isFetching, error, isFetched } =
     useQuery<ListPipelineJobsResponse>({
-      queryKey: ["runs", backendUrl, pageToken, search.filter],
+      queryKey: ["runs", pageToken, search.filter],
       refetchOnWindowFocus: false,
       enabled: configured && available,
       queryFn: async () => {

src/components/PipelineRun/RunDetails.test.tsx

@@ -17,6 +17,7 @@ import { ContextPanelProvider } from "@/providers/ContextPanelProvider";
 import { ExecutionDataProvider } from "@/providers/ExecutionDataProvider";
 import * as executionService from "@/services/executionService";
 import type { ComponentSpec } from "@/utils/componentSpec";
+import { BACKEND_QUERY_KEY } from "@/utils/constants";
 
 import { RunDetails } from "./RunDetails";
 
@@ -67,6 +68,8 @@ describe("<RunDetails/>", () => {
     },
   });
 
+  const MOCK_BACKEND_URL = "http://localhost:8000";
+
   const mockExecutionDetails: GetExecutionInfoResponse = {
     id: "test-execution-id",
     pipeline_run_id: "123",
@@ -138,7 +141,10 @@ describe("<RunDetails/>", () => {
       error: null,
     });
 
-    queryClient.setQueryData(["pipeline-run-metadata", "123"], mockPipelineRun);
+    queryClient.setQueryData(
+      [BACKEND_QUERY_KEY, "pipeline-run-metadata", "123"],
+      mockPipelineRun,
+    );
 
     vi.mocked(executionService.countTaskStatuses).mockReturnValue({
       total: 2,
@@ -160,7 +166,7 @@ describe("<RunDetails/>", () => {
       configured: true,
       available: true,
       ready: true,
-      backendUrl: "http://localhost:8000",
+      backendUrl: MOCK_BACKEND_URL,
       isConfiguredFromEnv: false,
       isConfiguredFromRelativePath: false,
       setEnvConfig: vi.fn(),
@@ -193,6 +199,50 @@ describe("<RunDetails/>", () => {
     });
   };
 
+  describe("Backend Configuration", () => {
+    test("should render run details when backend is configured", async () => {
+      // The default mock has configured: true and backendUrl: MOCK_BACKEND_URL
+      // act
+      renderWithProviders(<RunDetails />);
+
+      // assert
+      await waitFor(() => {
+        expect(screen.getByText("Test Pipeline")).toBeInTheDocument();
+        expect(screen.getByText("Run Id:")).toBeInTheDocument();
+        expect(screen.getByText("123")).toBeInTheDocument();
+      });
+    });
+
+    test("should render run details when backendUrl is empty string", async () => {
+      // arrange - simulate custom backend toggle disabled (empty backendUrl)
+      vi.mocked(useBackend).mockReturnValue({
+        configured: true,
+        available: true,
+        ready: true,
+        backendUrl: "",
+        isConfiguredFromEnv: false,
+        isConfiguredFromRelativePath: true,
+        setEnvConfig: vi.fn(),
+        setRelativePathConfig: vi.fn(),
+        setBackendUrl: vi.fn(),
+        ping: vi.fn(),
+      });
+
+      // Query key no longer includes backendUrl - cache is shared regardless of URL
+      // and invalidated when backend URL changes
+
+      // act
+      renderWithProviders(<RunDetails />);
+
+      // assert
+      await waitFor(() => {
+        expect(screen.getByText("Test Pipeline")).toBeInTheDocument();
+        expect(screen.getByText("Run Id:")).toBeInTheDocument();
+        expect(screen.getByText("123")).toBeInTheDocument();
+      });
+    });
+  });
+
   describe("Inspect Pipeline Button", () => {
     test("should render inspect button when pipeline exists", async () => {
       // arrange
@@ -282,7 +332,7 @@ describe("<RunDetails/>", () => {
       };
 
       queryClient.setQueryData(
-        ["pipeline-run-metadata", "123"],
+        [BACKEND_QUERY_KEY, "pipeline-run-metadata", "123"],
         pipelineRunWithDifferentCreator,
       );
 

src/components/shared/ReactFlow/FlowCanvas/TaskNode/TaskOverview/IOSection/IOSection.tsx

@@ -8,6 +8,7 @@ import { useBackend } from "@/providers/BackendProvider";
 import { getExecutionArtifacts } from "@/services/executionService";
 import { getBackendStatusString } from "@/utils/backend";
 import type { TaskSpec } from "@/utils/componentSpec";
+import { BACKEND_QUERY_KEY } from "@/utils/constants";
 
 import IOExtras from "./IOExtras";
 import IOInputs from "./IOInputs";
@@ -28,9 +29,9 @@ const IOSection = ({ taskSpec, executionId, readOnly }: IOSectionProps) => {
     isFetching,
     error,
   } = useQuery({
-    queryKey: ["artifacts", executionId],
+    queryKey: [BACKEND_QUERY_KEY, "artifacts", executionId],
     queryFn: () => getExecutionArtifacts(String(executionId), backendUrl),
-    enabled: !!executionId,
+    enabled: !!executionId && configured,
   });
 
   if (!configured) {

src/components/shared/ReactFlow/FlowCanvas/TaskNode/TaskOverview/logs.tsx

@@ -9,6 +9,7 @@ import { Spinner } from "@/components/ui/spinner";
 import { useBackend } from "@/providers/BackendProvider";
 import type { RunStatus } from "@/types/pipelineRun";
 import { getBackendStatusString } from "@/utils/backend";
+import { BACKEND_QUERY_KEY } from "@/utils/constants";
 
 const LogDisplay = ({
   logs,
@@ -114,10 +115,10 @@ const Logs = ({
     log_text?: string;
     system_error_exception_full?: string;
   }>();
-  const { data, isLoading, error, refetch } = useQuery({
-    queryKey: ["logs", executionId],
+  const { data, isLoading, error } = useQuery({
+    queryKey: [BACKEND_QUERY_KEY, "logs", executionId],
     queryFn: () => getLogs(String(executionId), backendUrl),
-    enabled: isLogging,
+    enabled: isLogging && configured,
     refetchInterval: 5000,
     refetchIntervalInBackground: false,
   });
@@ -142,10 +143,6 @@ const Logs = ({
     }
   }, [data, error]);
 
-  useEffect(() => {
-    refetch();
-  }, [backendUrl, refetch]);
-
   if (!configured) {
     return (
       <InfoBox title="Backend not configured" variant="warning">

src/hooks/usePipelineRunData.ts

@@ -10,11 +10,12 @@ import {
   getRunStatus,
   isStatusComplete,
 } from "@/services/executionService";
+import { BACKEND_QUERY_KEY } from "@/utils/constants";
 
 const useRootExecutionId = (id: string) => {
-  const { backendUrl } = useBackend();
+  const { backendUrl, configured } = useBackend();
   const { data: rootExecutionId } = useQuery({
-    queryKey: ["pipeline-run-execution-id", id],
+    queryKey: [BACKEND_QUERY_KEY, "pipeline-run-execution-id", id],
     queryFn: async () => {
       const rootExecutionId = await fetchPipelineRun(id, backendUrl)
         .then((res) => res.root_execution_id)
@@ -27,7 +28,7 @@ const useRootExecutionId = (id: string) => {
       // assuming id is root_execution_id
       return id;
     },
-    enabled: !!id && id.length > 0,
+    enabled: !!id && id.length > 0 && configured,
     staleTime: Infinity,
   });
 
@@ -36,13 +37,13 @@ const useRootExecutionId = (id: string) => {
 
 /* Accepts root_execution_id or run_id and returns execution details and state */
 export const usePipelineRunData = (id: string) => {
-  const { backendUrl } = useBackend();
+  const { backendUrl, configured } = useBackend();
 
   const rootExecutionId = useRootExecutionId(id);
 
   const { data: executionDetails } = useQuery({
-    enabled: !!rootExecutionId,
-    queryKey: ["execution-details", rootExecutionId],
+    enabled: !!rootExecutionId && configured,
+    queryKey: [BACKEND_QUERY_KEY, "execution-details", rootExecutionId],
     queryFn: async () => {
       if (!rootExecutionId) {
         throw new Error("No root execution id found");
@@ -58,8 +59,8 @@ export const usePipelineRunData = (id: string) => {
     error,
     isLoading,
   } = useQuery({
-    enabled: !!rootExecutionId && !!executionDetails,
-    queryKey: ["pipeline-run", rootExecutionId],
+    enabled: !!rootExecutionId && !!executionDetails && configured,
+    queryKey: [BACKEND_QUERY_KEY, "pipeline-run", rootExecutionId],
     queryFn: async () => {
       if (!rootExecutionId) {
         throw new Error("No root execution id found");

src/hooks/useSubgraphBreadcrumbs.ts

@@ -4,7 +4,7 @@ import { useMemo } from "react";
 import { useBackend } from "@/providers/BackendProvider";
 import { fetchExecutionDetails } from "@/services/executionService";
 import { isGraphImplementationOutput } from "@/utils/componentSpec";
-import { ONE_MINUTE_IN_MS } from "@/utils/constants";
+import { BACKEND_QUERY_KEY, ONE_MINUTE_IN_MS } from "@/utils/constants";
 
 export interface BreadcrumbSegment {
   taskId: string;
@@ -27,11 +27,16 @@ export const useSubgraphBreadcrumbs = (
   rootExecutionId: string | undefined,
   subgraphExecutionId: string | undefined,
 ): SubgraphBreadcrumbsResult => {
-  const { backendUrl } = useBackend();
+  const { backendUrl, configured } = useBackend();
   const queryClient = useQueryClient();
 
   const { data, isLoading, error } = useQuery({
-    queryKey: ["subgraph-breadcrumbs", rootExecutionId, subgraphExecutionId],
+    queryKey: [
+      BACKEND_QUERY_KEY,
+      "subgraph-breadcrumbs",
+      rootExecutionId,
+      subgraphExecutionId,
+    ],
     queryFn: async () => {
       if (!rootExecutionId || !subgraphExecutionId) {
         return { segments: [] };
@@ -44,7 +49,7 @@ export const useSubgraphBreadcrumbs = (
       const segmentsInReverseOrder: BreadcrumbSegment[] = [];
       let currentExecutionId = subgraphExecutionId;
       let currentDetails = await queryClient.ensureQueryData({
-        queryKey: ["execution-details", currentExecutionId],
+        queryKey: [BACKEND_QUERY_KEY, "execution-details", currentExecutionId],
         queryFn: () => fetchExecutionDetails(currentExecutionId, backendUrl),
         staleTime: ONE_MINUTE_IN_MS,
       });
@@ -57,7 +62,7 @@ export const useSubgraphBreadcrumbs = (
         }
 
         const parentDetails = await queryClient.ensureQueryData({
-          queryKey: ["execution-details", parentExecutionId],
+          queryKey: [BACKEND_QUERY_KEY, "execution-details", parentExecutionId],
           queryFn: () => fetchExecutionDetails(parentExecutionId, backendUrl),
           staleTime: ONE_MINUTE_IN_MS,
         });
@@ -95,7 +100,8 @@ export const useSubgraphBreadcrumbs = (
     enabled:
       !!rootExecutionId &&
       !!subgraphExecutionId &&
-      rootExecutionId !== subgraphExecutionId,
+      rootExecutionId !== subgraphExecutionId &&
+      configured,
     staleTime: ONE_MINUTE_IN_MS,
     retry: 1,
   });

src/providers/BackendProvider.tsx

@@ -1,13 +1,15 @@
+import { useQueryClient } from "@tanstack/react-query";
 import {
   type ReactNode,
   useCallback,
   useEffect,
   useMemo,
+  useRef,
   useState,
 } from "react";
 
 import useToastNotification from "@/hooks/useToastNotification";
-import { API_URL } from "@/utils/constants";
+import { API_URL, BACKEND_QUERY_KEY } from "@/utils/constants";
 import {
   getUseEnv,
   getUserBackendUrl,
@@ -45,6 +47,7 @@ const BackendContext =
 
 export const BackendProvider = ({ children }: { children: ReactNode }) => {
   const notify = useToastNotification();
+  const queryClient = useQueryClient();
 
   const backendUrlFromEnv = API_URL;
 
@@ -55,6 +58,9 @@ export const BackendProvider = ({ children }: { children: ReactNode }) => {
   const [settingsLoaded, setSettingsLoaded] = useState(false);
   const [ready, setReady] = useState(false);
 
+  // Track the previous backend URL to detect changes
+  const previousBackendUrlRef = useRef<string | null>(null);
+
   let backendUrl = "";
   if (useEnv && backendUrlFromEnv) {
     backendUrl = backendUrlFromEnv;
@@ -133,6 +139,17 @@ export const BackendProvider = ({ children }: { children: ReactNode }) => {
     }
   }, [backendUrl, settingsLoaded]);
 
+  // Invalidate only backend-dependent queries when the backend URL changes
+  useEffect(() => {
+    if (
+      previousBackendUrlRef.current !== null &&
+      previousBackendUrlRef.current !== backendUrl
+    ) {
+      queryClient.invalidateQueries({ queryKey: [BACKEND_QUERY_KEY] });
+    }
+    previousBackendUrlRef.current = backendUrl;
+  }, [backendUrl, queryClient]);
+
   useEffect(() => {
     const getSettings = async () => {
       const url = await getUserBackendUrl();

src/services/executionService.ts

@@ -11,6 +11,7 @@ import type {
 import { useBackend } from "@/providers/BackendProvider";
 import type { RunStatus, TaskStatusCounts } from "@/types/pipelineRun";
 import {
+  BACKEND_QUERY_KEY,
   DEFAULT_RATE_LIMIT_RPS,
   TWENTY_FOUR_HOURS_IN_MS,
 } from "@/utils/constants";
@@ -45,12 +46,12 @@ export const fetchPipelineRun = async (
 };
 
 export const useFetchPipelineRunMetadata = (runId: string | undefined) => {
-  const { backendUrl } = useBackend();
+  const { backendUrl, configured } = useBackend();
 
   return useQuery<PipelineRunResponse>({
-    queryKey: ["pipeline-run-metadata", runId],
+    queryKey: [BACKEND_QUERY_KEY, "pipeline-run-metadata", runId],
     queryFn: () => fetchPipelineRun(runId!, backendUrl),
-    enabled: !!runId,
+    enabled: !!runId && configured,
     refetchOnWindowFocus: false,
     staleTime: TWENTY_FOUR_HOURS_IN_MS,
   });
@@ -68,10 +69,12 @@ export const useFetchContainerExecutionState = (
   executionId: string | undefined,
   backendUrl: string,
 ) => {
+  const { configured } = useBackend();
+
   return useQuery<GetContainerExecutionStateResponse>({
-    queryKey: ["container-execution-state", executionId],
+    queryKey: [BACKEND_QUERY_KEY, "container-execution-state", executionId],
     queryFn: () => fetchContainerExecutionState(executionId!, backendUrl),
-    enabled: !!executionId,
+    enabled: !!executionId && configured,
     refetchOnWindowFocus: false,
   });
 };

src/utils/constants.ts

@@ -80,3 +80,7 @@ export const ISO8601_DURATION_ZERO_DAYS = "P0D";
 export const DEFAULT_RATE_LIMIT_RPS = 10; // requests per second
 
 export const MINUTES = 60 * 1000;
+
+// Query key prefix for backend-dependent queries
+// All queries with this prefix are invalidated when the backend URL changes
+export const BACKEND_QUERY_KEY = "backend";