Remove grpc returned error (#12537)

Signed-off-by: godchen <qingxiang.chen@zilliz.com>

internal/datacoord/services.go

@@ -693,7 +693,7 @@ func (s *Server) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest
 
 		s.metricsCacheManager.UpdateSystemInfoMetrics(metrics)
 
-		return metrics, err
+		return metrics, nil
 	}
 
 	log.Debug("DataCoord.GetMetrics failed, request metric type is not implemented yet",

internal/datanode/data_node.go

@@ -724,7 +724,7 @@ func (node *DataNode) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRe
 			zap.Any("systemInfoMetrics", systemInfoMetrics), // TODO(dragondriver): necessary? may be very large
 			zap.Error(err))
 
-		return systemInfoMetrics, err
+		return systemInfoMetrics, nil
 	}
 
 	log.Debug("DataNode.GetMetrics failed, request metric type is not implemented yet",

internal/indexcoord/index_coord.go

@@ -501,7 +501,12 @@ func (i *IndexCoord) GetIndexFilePaths(ctx context.Context, req *indexpb.GetInde
 	for _, indexID := range req.IndexBuildIDs {
 		indexPathInfo, err := i.metaTable.GetIndexFilePathInfo(indexID)
 		if err != nil {
-			return nil, err
+			return &indexpb.GetIndexFilePathsResponse{
+				Status: &commonpb.Status{
+					ErrorCode: commonpb.ErrorCode_UnexpectedError,
+					Reason:    err.Error(),
+				},
+			}, nil
 		}
 		indexPaths = append(indexPaths, indexPathInfo)
 	}
@@ -577,7 +582,7 @@ func (i *IndexCoord) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsReq
 
 		i.metricsCacheManager.UpdateSystemInfoMetrics(metrics)
 
-		return metrics, err
+		return metrics, nil
 	}
 
 	log.Debug("IndexCoord.GetMetrics failed, request metric type is not implemented yet",

internal/indexnode/indexnode.go

@@ -389,7 +389,7 @@ func (i *IndexNode) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequ
 			zap.Any("metrics", metrics), // TODO(dragondriver): necessary? may be very large
 			zap.Error(err))
 
-		return metrics, err
+		return metrics, nil
 	}
 
 	log.Warn("IndexNode.GetMetrics failed, request metric type is not implemented yet",

internal/proxy/impl.go

@@ -65,7 +65,7 @@ func (node *Proxy) GetComponentStates(ctx context.Context) (*internalpb.Componen
 			ErrorCode: commonpb.ErrorCode_UnexpectedError,
 			Reason:    errMsg,
 		}
-		return stats, errors.New(errMsg)
+		return stats, nil
 	}
 	nodeID := common.NotRegisteredID
 	if node.session != nil && node.session.Registered() {
@@ -2771,7 +2771,7 @@ func (node *Proxy) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsReque
 
 		node.metricsCacheManager.UpdateSystemInfoMetrics(metrics)
 
-		return metrics, err
+		return metrics, nil
 	}
 
 	log.Debug("Proxy.GetMetrics failed, request metric type is not implemented yet",