From 96954d17948662672cababc940e453dff08e8cbb Mon Sep 17 00:00:00 2001
From: Anthony Towns <aj@erisian.com.au>
Date: Wed, 12 Feb 2020 01:32:46 +1000
Subject: [PATCH] DNS seeds: don't query DNS while network is inactive

---
 src/net.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/net.cpp b/src/net.cpp
index 4eb26b095e7..b3404a4704c 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1630,8 +1630,14 @@ void CConnman::ThreadDNSAddressSeed()
             }
         }
 
-        if (interruptNet) {
-            return;
+        if (interruptNet) return;
+
+        // hold off on querying seeds if p2p network deactivated
+        if (!fNetworkActive) {
+            LogPrintf("Waiting for network to be reactivated before querying DNS seeds.\n");
+            do {
+                if (!interruptNet.sleep_for(std::chrono::seconds{1})) return;
+            } while (!fNetworkActive);
         }
 
         LogPrintf("Loading addresses from DNS seed %s\n", seed);