improve control connection error/reconnection logging

control.go

@@ -314,6 +314,10 @@ func (c *controlConn) setupConn(conn *Conn) error {
 	}
 
 	c.conn.Store(ch)
+
+	c.session.logger.Info("gocql: control connection connected to %v (%s).",
+		NewLogField("host_addr", host.ConnectAddress().String()), NewLogField("host_id", host.HostID()))
+
 	if c.session.initialized() {
 		// We connected to control conn, so add the connect the host in pool as well.
 		// Notify session we can start trying to connect to the node.
@@ -463,6 +467,11 @@ func (c *controlConn) HandleError(conn *Conn, err error, closed bool) {
 		return
 	}
 
+	c.session.logger.Info("gocql: control connection error %v (%s): %v\n",
+		NewLogField("host_addr", conn.host.ConnectAddress().String()),
+		NewLogField("host_id", conn.host.HostID()),
+		NewLogField("err", err.Error()))
+
 	c.reconnect()
 }
 

session.go

@@ -218,19 +218,6 @@ func (s *Session) init() error {
 			return err
 		}
 
-		controlHostConn := s.control.getConn()
-		var controlHost *HostInfo
-		var controlHostAddr string
-		var controlHostId string
-		if controlHostConn != nil {
-			controlHost = controlHostConn.host
-			controlHostAddr = controlHost.ConnectAddress().String()
-			controlHostId = controlHost.HostID()
-		}
-
-		s.logger.Info("gocql: control connection successfully connected to host %v (%v).",
-			NewLogField("host_addr", controlHostAddr), NewLogField("host_id", controlHostId))
-
 		if !s.cfg.DisableInitialHostLookup {
 			var partitioner string
 			newHosts, partitioner, err := s.hostSource.GetHosts()