From 70ade693c775f131025b19189d30d10b655cdc79 Mon Sep 17 00:00:00 2001
From: Jeff <158072326+jeffrey701@users.noreply.github.com>
Date: Mon, 27 Jul 2026 15:33:20 +0200
Subject: [PATCH] fix(miner): log discovery-index query failures before failing
 open

---
 .../loopover-miner/lib/discovery-index-client.ts   |  5 ++++-
 test/unit/miner-discovery-index-client.test.ts     | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/packages/loopover-miner/lib/discovery-index-client.ts b/packages/loopover-miner/lib/discovery-index-client.ts
index ab40472906..bd22bfc065 100644
--- a/packages/loopover-miner/lib/discovery-index-client.ts
+++ b/packages/loopover-miner/lib/discovery-index-client.ts
@@ -107,7 +107,10 @@ export async function queryDiscoveryIndex(
     if (!response.ok) return EMPTY_QUERY_RESPONSE;
     const payload = await response.json().catch(() => null);
     return normalizeDiscoveryIndexResponse(payload).response;
-  } catch {
+  } catch (error) {
+    // #9329: log before failing open, matching submitSoftClaim's best-effort-network convention; the
+    // EMPTY_QUERY_RESPONSE return type has no slot to surface the error, so a debug line is the only visibility.
+    getLogger().debug("discovery_plane_query_failed", { error: describeCliError(error) });
     return EMPTY_QUERY_RESPONSE;
   }
 }
diff --git a/test/unit/miner-discovery-index-client.test.ts b/test/unit/miner-discovery-index-client.test.ts
index aa21b0dc0c..a6f218ccc4 100644
--- a/test/unit/miner-discovery-index-client.test.ts
+++ b/test/unit/miner-discovery-index-client.test.ts
@@ -111,6 +111,20 @@ describe("queryDiscoveryIndex (#7168)", () => {
     );
     expect(threw.candidates).toEqual([]);
   });
+
+  it("logs discovery_plane_query_failed before failing open when the fetch throws (#9329)", async () => {
+    const response = await queryDiscoveryIndex(
+      { repos: ["a/b"] },
+      {
+        env: ENABLED_ENV,
+        fetchImpl: async () => {
+          throw new Error("network exploded");
+        },
+      },
+    );
+    expect(response.candidates).toEqual([]);
+    expect(logSpy.debug).toHaveBeenCalledWith("discovery_plane_query_failed", { error: "network exploded" });
+  });
 });
 
 describe("submitSoftClaim (#7168)", () => {