Rename error.

Author: Yen-Cheng Chou

retrieval/series_cache.go

@@ -43,7 +43,7 @@ var (
 	keyReason, _ = tag.NewKey("reason")
 )
 
-type unrecoverableError struct {
+type unknownMetricError struct {
 	error
 }
 
@@ -451,14 +451,14 @@ func (c *seriesCache) refresh(ctx context.Context, ref uint64) error {
 			ts.MetricKind = metric_pb.MetricDescriptor_GAUGE
 			ts.ValueType = metric_pb.MetricDescriptor_DOUBLE
 		default:
-			return unrecoverableError{errors.Errorf("unexpected metric name suffix %q", suffix)}
+			return unknownMetricError{errors.Errorf("unexpected metric name suffix %q", suffix)}
 		}
 	case textparse.MetricTypeHistogram:
 		ts.Metric.Type = c.getMetricType(c.metricsPrefix, baseMetricName)
 		ts.MetricKind = metric_pb.MetricDescriptor_CUMULATIVE
 		ts.ValueType = metric_pb.MetricDescriptor_DISTRIBUTION
 	default:
-		return unrecoverableError{errors.Errorf("unexpected metric type %s", metadata.Type)}
+		return unknownMetricError{errors.Errorf("unexpected metric type %s", metadata.Type)}
 	}
 
 	entry.proto = ts

retrieval/transform.go

@@ -143,7 +143,7 @@ func (b *sampleBuilder) getSeriesWithRetry(ctx context.Context, sample tsdb.RefS
 		if err == nil {
 			break
 		}
-		if _, ok := err.(unrecoverableError); ok {
+		if _, ok := err.(unknownMetricError); ok {
 			return nil, false, err
 		}
 		level.Warn(b.logger).Log("msg", "failed to get seriesCacheEntry", "err", err)