dnsdist: Fix backends kept after upgrade no longer working

diff --git a/pdns/dnsdistdist/dnsdist-discovery.cc b/pdns/dnsdistdist/dnsdist-discovery.cc
index 038148383b9dee5861167211d5861373e98b0dc0..5cca42b15f2c25e40689e599b10108173706292e 100644 (file)
--- a/pdns/dnsdistdist/dnsdist-discovery.cc
+++ b/pdns/dnsdistdist/dnsdist-discovery.cc
@@ -481,7 +481,9 @@ bool ServiceDiscovery::tryToUpgradeBackend(const UpgradeableBackend& backend)
 
     g_pools.setState(localPools);
     g_dstates.setState(states);
-    backend.d_ds->stop();
+    if (!backend.keepAfterUpgrade) {
+      backend.d_ds->stop();
+    }
 
     return true;
   }