From 841eaacb07b797fbca93d63b4cbe42132e1e1cff Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Tue, 8 Oct 2024 10:34:08 -0700
Subject: [PATCH] net/sockstats: quiet some log spam in release builds

Updates #13731

Change-Id: Ibee85426827ebb9e43a1c42a9c07c847daa50117
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
---
 net/sockstats/sockstats_tsgo.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/sockstats/sockstats_tsgo.go b/net/sockstats/sockstats_tsgo.go
index 2d1ccd5a3..af691302f 100644
--- a/net/sockstats/sockstats_tsgo.go
+++ b/net/sockstats/sockstats_tsgo.go
@@ -18,6 +18,7 @@ import (
 	"tailscale.com/net/netmon"
 	"tailscale.com/types/logger"
 	"tailscale.com/util/clientmetric"
+	"tailscale.com/version"
 )
 
 const IsAvailable = true
@@ -156,7 +157,11 @@ func withSockStats(ctx context.Context, label Label, logf logger.Logf) context.C
 		}
 	}
 	willOverwrite := func(trace *net.SockTrace) {
-		logf("sockstats: trace %q was overwritten by another", label)
+		if version.IsUnstableBuild() {
+			// Only spam about this in dev builds.
+			// See https://github.com/tailscale/tailscale/issues/13731 for known problems.
+			logf("sockstats: trace %q was overwritten by another", label)
+		}
 	}
 
 	return net.WithSockTrace(ctx, &net.SockTrace{