From 3b64953775c54646b19667b46a3aeab66a851533 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 10 Apr 2026 16:07:55 +0000
Subject: [PATCH] Fix: log HTTP connection errors to stderr for operator
 visibility

When an HTTP backend connection fails (e.g., 401 auth errors), log the
error to stderr via log.Printf so operators can see the reason. The error
chain includes the backend response body with specific messages like
"Missing API key" or "Invalid API key". This fixes TestTavilyAuthFailure
integration tests which check stderr for these error messages.

Agent-Logs-Url: https://github.com/github/gh-aw-mcpg/sessions/40888e44-12ac-4b0d-b93b-083f02fe9a52

Co-authored-by: lpcox <15877973+lpcox@users.noreply.github.com>
---
 internal/launcher/launcher.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/internal/launcher/launcher.go b/internal/launcher/launcher.go
index 8ee9a7da..d1bd0cff 100644
--- a/internal/launcher/launcher.go
+++ b/internal/launcher/launcher.go
@@ -143,6 +143,7 @@ func GetOrLaunch(l *Launcher, serverID string) (*mcp.Connection, error) {
 			// Create an HTTP connection
 			conn, err := mcp.NewHTTPConnection(l.ctx, serverID, serverCfg.URL, serverCfg.Headers, oidcProvider, oidcAudience, l.config.Gateway.HTTPKeepaliveInterval())
 			if err != nil {
+				log.Printf("FAILED to create HTTP connection for server %q: %v", serverID, err)
 				logger.LogErrorWithServer(serverID, "backend", "Failed to create HTTP connection: %s, error=%v", serverID, err)
 				l.recordError(serverID, err.Error())
 				return nil, fmt.Errorf("failed to create HTTP connection: %w", err)