VictoriaMetrics/VictoriaMetrics · error

missing columns in the csv line %q; got %d columns; want at

Error message

missing columns in the csv line %q; got %d columns; want at least %d columns

What it means

Set as sc.Error in csvimport parseRows when the CSV line contains fewer columns than the declared column descriptors require, so some fields cannot be filled. %q is the whole line, %d the number of columns found, and the last %d the required minimum.

Source

Thrown at lib/protoparser/csvimport/parser.go:172

					Value: sc.Column,
				})
				continue
			}
			metricName := cd.MetricName
			if metricName == "" {
				logger.Panicf("BUG: unexpected empty MetricName")
			}
			value, err := fastfloat.Parse(sc.Column)
			if err != nil {
				sc.Error = fmt.Errorf("cannot parse metric value for %q from %q: %w", metricName, sc.Column, err)
			}
			metrics = append(metrics, metric{
				Name:  metricName,
				Value: value,
			})
		}
		if col < uint(len(cds)) && sc.Error == nil {
			sc.Error = fmt.Errorf("missing columns in the csv line %q; got %d columns; want at least %d columns", line, col, len(cds))
		}
		if sc.Error != nil {
			logger.Errorf("error when parsing csv line %q: %s; skipping this line", line, sc.Error)
			invalidLines.Inc()
			continue
		}
		if len(metrics) == 0 {
			continue
		}
		r.Metric = metrics[0].Name
		r.Tags = tags[tagsLen:]
		r.Value = metrics[0].Value
		dst = append(dst, r)
		for _, m := range metrics[1:] {
			dst = append(dst, Row{
				Metric:    m.Name,
				Tags:      r.Tags,
				Value:     m.Value,

View on GitHub (pinned to 5079fb58f1)

Solutions

1. Fix the CSV rows to include all columns referenced by the format
2. Adjust the format descriptors to reference fewer columns

When it happens

Trigger: Thrown at lib/protoparser/csvimport/parser.go:172 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of VictoriaMetrics/VictoriaMetrics@5079fb58f1 (2026-09-03). Data as JSON: /api/errors/bfde3d62abf55838. Report an issue: GitHub.