add conn nm seed log

nm/monitor_seed.go

@@ -23,6 +23,7 @@ func monitorNodeManagerSeed() {
 				if connectNmCumulativeCount == conf.GetConfig().AllowConnNmCount {
 					panic("Dial nm seed service client failed")
 				}
+				log.Warn("Connect nm seed service client is nil")
 				connectNmCumulativeCount++
 				continue
 			}
@@ -31,6 +32,7 @@ func monitorNodeManagerSeed() {
 				if connectNmCumulativeCount == conf.GetConfig().AllowConnNmCount {
 					panic("Nm seed seed service is dealing")
 				}
+				log.WithError(err).Warn("Get manager list failed through nm seed service")
 				connectNmCumulativeCount++
 				continue
 			}