修复日志打印错误

service.go

@@ -112,7 +112,7 @@ func (svr *Service) worker() {
 				if err = svr.registry.Register(svr.node); err != nil {
 					svr.triesRegister++
 					if svr.triesRegister%15 == 0 {
-						log.Warnf("try register service %s failed to many times", svr.opts.ShortName(), err.Error())
+						log.Warnf("try register service %s failed to many times", svr.opts.ShortName())
 					}
 				} else {
 					svr.triesRegister = 0