[fix]syncer health failure (#1322)

* [fix]syncer health failure

* [fix]syncer health failure
diff --git a/syncer/rpc/server.go b/syncer/rpc/server.go
index 5601b0a..990f789 100644
--- a/syncer/rpc/server.go
+++ b/syncer/rpc/server.go
@@ -77,6 +77,7 @@
 	// TODO enable to close syncer
 	if !config.GetConfig().Sync.EnableOnStart {
 		resp.Status = HealthStatusClose
+		log.Error("unexpected health check when syncer is closed", nil)
 		return resp, nil
 	}
 	return resp, nil
diff --git a/syncer/service/admin/health.go b/syncer/service/admin/health.go
index 5a6e1c4..60ec710 100644
--- a/syncer/service/admin/health.go
+++ b/syncer/service/admin/health.go
@@ -35,7 +35,7 @@
 )
 
 const (
-	scheme      = "health_rpc"
+	scheme      = "grpc"
 	serviceName = "syncer"
 )
 
@@ -130,7 +130,7 @@
 	set := client.NewSet(clientConn)
 	reply, err := set.EventServiceClient.Health(context.Background(), &v1sync.HealthRequest{})
 	if err != nil || reply == nil {
-		log.Warn("health request is err")
+		log.Error("get peer health failed", err)
 		return rpc.HealthStatusAbnormal
 	}
 	reportClockDiff(peerName, local, reply.LocalTimestamp)