fix

pool.go

@@ -265,7 +265,9 @@ func (d *Pool) Start() {
 				}
 			}
 
-			d.srvMaster.Alive = d.ping(d.srvMaster) == nil
+			if d.srvMaster != nil {
+				d.srvMaster.Alive = d.ping(d.srvMaster) == nil
+			}
 
 			time.Sleep(time.Second)
 		}
@@ -277,7 +279,7 @@ func (d *Pool) Stop() {
 }
 
 func (d *Pool) IsAlive() bool {
-	return d.srvMaster.Alive
+	return d.srvMaster != nil && d.srvMaster.Alive
 }
 
 func (d *Pool) prepare(sql string, param map[string]any) string {

stats.go

@@ -34,7 +34,11 @@ func (d *Pool) StatPool() []*Stat {
 		out = append(out, d.stat(q))
 	}
 
-	return append(out, d.stat(d.srvMaster))
+	if d.srvMaster != nil {
+		return append(out, d.stat(d.srvMaster))
+	}
+
+	return out
 }
 
 func (d *Pool) StatPoolTotal() *Stat {