Update `ErrRequestErrorBase` from `[plugin.downstreamError]` to `[plugin.requestFailureError]` (#100965)

* Update ErrRequestErrorBase to make it more clear for developers

* Trigger build

* requestError -> requestFailureError

* Fix test

* Update pkg/plugins/backendplugin/grpcplugin/client_v2.go

Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

---------

Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/api/ds_query_test.go

@@ -249,7 +249,7 @@ func TestDataSourceQueryError(t *testing.T) {
 			expectedStatus: errutil.StatusInternal.HTTPStatus(),
 			expectedBody: body{
 				Message:    "An error occurred within the plugin",
-				MessageId:  "plugin.downstreamError",
+				MessageId:  "plugin.requestFailureError",
 				StatusCode: 500,
 			},
 		},

pkg/apimachinery/errutil/errors.go

@@ -114,7 +114,7 @@ func ValidationFailed(msgID string, opts ...BaseOpt) Base {
 // msgID should be structured as component.errorBrief, for example
 //
 //	sqleng.connectionError
-//	plugin.downstreamError
+//	plugin.requestFailureError
 func Internal(msgID string, opts ...BaseOpt) Base {
 	return NewBase(StatusInternal, msgID, opts...)
 }

pkg/plugins/backendplugin/grpcplugin/client_v2.go

@@ -356,15 +356,14 @@ func handleGrpcStatusError(ctx context.Context, errorSource errstatus.Source, er
 		if innerErr != nil {
 			logger.Error("Could not set downstream error source", "error", innerErr)
 		}
-		return plugins.ErrPluginDownstreamErrorBase.Errorf("%v", err)
+		return plugins.ErrPluginRequestFailureErrorBase.Errorf("%v", err)
 	case backend.ErrorSourcePlugin:
 		errorSourceErr := backend.WithErrorSource(ctx, backend.ErrorSourcePlugin)
 		if errorSourceErr != nil {
 			logger.Error("Could not set plugin error source", "error", errorSourceErr)
 		}
-		// a downstream error is returned here as plugin errors are considered as downstream errors in the
-		// context of the Grafana server.
-		return plugins.ErrPluginDownstreamErrorBase.Errorf("%v", err)
+		// plugin request has failed after being sent from the Grafana server
+		return plugins.ErrPluginRequestFailureErrorBase.Errorf("%v", err)
 	}
 	return fmt.Errorf("%v: %w", "Failed to query data", err)
 }

pkg/plugins/errors.go

@@ -24,9 +24,9 @@ var (
 		errutil.WithPublicMessage("Plugin health check failed"),
 		errutil.WithDownstream())
 
-	// ErrPluginDownstreamErrorBase error returned when a plugin request fails.
-	// Exposed as a base error to wrap it with plugin downstream errors.
-	ErrPluginDownstreamErrorBase = errutil.Internal("plugin.downstreamError",
+	// ErrPluginRequestFailureErrorBase error returned when a plugin request fails.
+	// Exposed as a base error to wrap it with plugin request errors.
+	ErrPluginRequestFailureErrorBase = errutil.Internal("plugin.requestFailureError",
 		errutil.WithPublicMessage("An error occurred within the plugin"),
 		errutil.WithDownstream())
 

pkg/plugins/manager/client/client.go

@@ -68,7 +68,7 @@ func (s *Service) QueryData(ctx context.Context, req *backend.QueryDataRequest)
 			return nil, plugins.ErrPluginRequestCanceledErrorBase.Errorf("client: query data request canceled: %w", err)
 		}
 
-		return nil, plugins.ErrPluginDownstreamErrorBase.Errorf("client: failed to query data: %w", err)
+		return nil, plugins.ErrPluginRequestFailureErrorBase.Errorf("client: failed to query data: %w", err)
 	}
 
 	for refID, res := range resp.Responses {
@@ -127,7 +127,7 @@ func (s *Service) CallResource(ctx context.Context, req *backend.CallResourceReq
 			return plugins.ErrPluginRequestCanceledErrorBase.Errorf("client: call resource request canceled: %w", err)
 		}
 
-		return plugins.ErrPluginDownstreamErrorBase.Errorf("client: failed to call resources: %w", err)
+		return plugins.ErrPluginRequestFailureErrorBase.Errorf("client: failed to call resources: %w", err)
 	}
 
 	return nil
@@ -149,7 +149,7 @@ func (s *Service) CollectMetrics(ctx context.Context, req *backend.CollectMetric
 			return nil, plugins.ErrPluginRequestCanceledErrorBase.Errorf("client: collect metrics request canceled: %w", err)
 		}
 
-		return nil, plugins.ErrPluginDownstreamErrorBase.Errorf("client: failed to collect metrics: %w", err)
+		return nil, plugins.ErrPluginRequestFailureErrorBase.Errorf("client: failed to collect metrics: %w", err)
 	}
 
 	return resp, nil

pkg/plugins/manager/client/client_test.go

@@ -38,7 +38,7 @@ func TestQueryData(t *testing.T) {
 			},
 			{
 				err:           errors.New("surprise surprise"),
-				expectedError: plugins.ErrPluginDownstreamErrorBase,
+				expectedError: plugins.ErrPluginRequestFailureErrorBase,
 			},
 			{
 				err:           context.Canceled,