From b659ee8820c92121b5a1aa4d99dbb88fd3359aaa Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Wed, 27 Oct 2021 09:25:47 +0200
Subject: [PATCH] dnsdist: Do not try to reconnect UDP sockets for TCP-only
 backends

---
 pdns/dnsdistdist/dnsdist-healthchecks.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/dnsdistdist/dnsdist-healthchecks.cc b/pdns/dnsdistdist/dnsdist-healthchecks.cc
index 56631b8aaa..ec9ab9902f 100644
--- a/pdns/dnsdistdist/dnsdist-healthchecks.cc
+++ b/pdns/dnsdistdist/dnsdist-healthchecks.cc
@@ -94,7 +94,7 @@ void updateHealthCheckResult(const std::shared_ptr<DownstreamState>& dss, bool i
   if (newState != dss->upStatus) {
     warnlog("Marking downstream %s as '%s'", dss->getNameWithAddr(), newState ? "up" : "down");
 
-    if (newState && (!dss->connected || dss->reconnectOnUp)) {
+    if (newState && !dss->isTCPOnly() && (!dss->connected || dss->reconnectOnUp)) {
       newState = dss->reconnect();
 
       if (dss->connected && !dss->threadStarted.test_and_set()) {
-- 
2.47.2