timely update of database servers in cluster cache (#14569)

kvahed · web-flow · commit 2c73237d81c7 · 2021-07-30T17:56:07.000+02:00
* database and coordinator server lists need be updated for timely update of cluster info
diff --git a/CHANGELOG b/CHANGELOG
@@ -1,6 +1,8 @@
 devel
 -----
 
+* Timely update of database server list on health check fixes BTS-505.
+
 * Add 3 AQL functions: COSINE_SIMILARITY, L1_DISTANCE and L2_DISTANCE.
 
 * Updated ArangoDB Starter to 0.15.1.
diff --git a/arangod/Cluster/HeartbeatThread.cpp b/arangod/Cluster/HeartbeatThread.cpp
@@ -271,14 +271,15 @@ void HeartbeatThread::run() {
       return true;
     };
     std::vector<std::string> const serverAgencyPaths{
-      "Current/ServersRegistered", "Target/MapUniqueToShortID", "Current/ServersKnown",
+      "Current/ServersRegistered", "Target/MapUniqueToShortID", "Current/ServersKnown", "Supervision/Health",
       "Current/ServersKnown/" + ServerState::instance()->getId()};
     for (auto const& path : serverAgencyPaths) {
       serverCallbacks.try_emplace(path, std::make_shared<AgencyCallback>(_server, path, upsrv, true, false));
     }
     std::function<bool(VPackSlice const& result)> upcrd = [self = shared_from_this()] (VPackSlice const& result) {
       LOG_TOPIC("2f09e", DEBUG, Logger::HEARTBEAT) << "Updating cluster's cache of current coordinators";
       self->server().getFeature<ClusterFeature>().clusterInfo().loadCurrentCoordinators();
+      self->server().getFeature<ClusterFeature>().clusterInfo().loadCurrentDBServers();
       return true;
     };
     std::string const path = "Current/Coordinators";
