diff --git a/components/analysis/AnalysisControlButtons.vue b/components/analysis/AnalysisControlButtons.vue
index 3ebc72d..f174908 100644
--- a/components/analysis/AnalysisControlButtons.vue
+++ b/components/analysis/AnalysisControlButtons.vue
@@ -73,10 +73,6 @@ const showSuccess = (summary: string, msg: string) => {
   });
 };
 
-// async function updateHubAnalysisRunStatus(update: string) {
-//   await updateAnalysis(props.analysisId!, { run_status: update });
-// }
-
 async function onStartAnalysis() {
   loading.value = true;
   setButtonStatuses(AnalysisNodeRunStatus.Starting);
diff --git a/composables/connectionErrorToast.ts b/composables/connectionErrorToast.ts
index d17a625..c57aba1 100644
--- a/composables/connectionErrorToast.ts
+++ b/composables/connectionErrorToast.ts
@@ -24,7 +24,18 @@ export const showKongConnectionErrorToast = () => {
     severity: "error",
     summary: "Connection error",
     detail: "Unable to contact the Kong gateway service.",
-    life: 3000,
+    life: 5000,
   });
   console.warn("Kong service unreachable");
 };
+
+export const showDownstreamConnectionErrorToast = () => {
+  const toast = useToastService();
+  toast.add({
+    severity: "error",
+    summary: "Connection error",
+    detail: "Unable to contact the downstream service.",
+    life: 5000,
+  });
+  console.warn("A downstream service unreachable");
+};
diff --git a/plugins/api.ts b/plugins/api.ts
index 7e05e25..97cec0a 100644
--- a/plugins/api.ts
+++ b/plugins/api.ts
@@ -1,6 +1,7 @@
 import {
   showKongConnectionErrorToast,
   showHubAdapterConnectionErrorToast,
+  showDownstreamConnectionErrorToast,
 } from "~/composables/connectionErrorToast";
 
 export default defineNuxtPlugin(() => {
@@ -33,6 +34,8 @@ export default defineNuxtPlugin(() => {
         } else {
           showHubAdapterConnectionErrorToast();
         }
+      } else if (response.status === 503) {
+        showDownstreamConnectionErrorToast();
       }
     },
   });