From 9ec0894dee543617e0f70344fef0c438992819c6 Mon Sep 17 00:00:00 2001
From: Joshua Powers <powersj@fastmail.com>
Date: Thu, 4 Jan 2024 03:11:47 -0700
Subject: [PATCH] fix(outputs.prometheus_client): Always default to TCP
 (#14471)

---
 plugins/outputs/prometheus_client/prometheus_client.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/plugins/outputs/prometheus_client/prometheus_client.go b/plugins/outputs/prometheus_client/prometheus_client.go
index af3bdc308..a43b45fa1 100644
--- a/plugins/outputs/prometheus_client/prometheus_client.go
+++ b/plugins/outputs/prometheus_client/prometheus_client.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"crypto/tls"
 	_ "embed"
-	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -217,12 +216,13 @@ func (p *PrometheusClient) listen() (net.Listener, error) {
 		return p.listenTCP(p.Listen)
 	}
 	switch strings.ToLower(u.Scheme) {
-	case "tcp", "http":
+	case "", "tcp", "http":
 		return p.listenTCP(u.Host)
 	case "vsock":
 		return p.listenVsock(u.Host)
+	default:
+		return p.listenTCP(u.Host)
 	}
-	return nil, errors.New("Unknown scheme")
 }
 
 func (p *PrometheusClient) Connect() error {