go-redis/redis · error

redis: can't parse push notification name length: %w

Error message

redis: can't parse push notification name length: %w

What it means

Error "redis: can't parse push notification name length: %w" thrown in go-redis/redis.

Source

Thrown at internal/proto/reader.go:226

		return "", false, fmt.Errorf("redis: empty push notification array length")
	}

	// First element type byte: '$' (bulk) or '+' (simple-string).
	if pos >= len(buf) {
		return "", false, nil
	}
	typeOfName := buf[pos]
	if typeOfName != RespString && typeOfName != RespStatus {
		return "", false, fmt.Errorf("redis: can't parse push notification name: %q", buf[pos:])
	}
	pos++

	if typeOfName == RespString {
		// Read "$M\r\n" then the M-byte name.
		lenStart := pos
		next, ok, err := skipDigitsThenCRLF(buf, pos)
		if err != nil {
			return "", false, fmt.Errorf("redis: can't parse push notification name length: %w", err)
		}
		if !ok {
			return "", false, nil
		}
		if next-2 == lenStart {
			return "", false, fmt.Errorf("redis: empty push notification name length")
		}
		nameLen, err := util.Atoi(buf[lenStart : next-2])
		if err != nil {
			return "", false, fmt.Errorf("redis: invalid push notification name length %q: %w", buf[lenStart:next-2], err)
		}
		if nameLen < 0 {
			return "", false, fmt.Errorf("redis: negative push notification name length: %d", nameLen)
		}
		// Compare against the remaining bytes instead of computing
		// next+nameLen: a hugely advertised length on malformed input could
		// overflow int, wrap negative, slip past an "end > len(buf)" guard and
		// panic the slice below. next <= len(buf) here, so the subtraction is

View on GitHub (pinned to 36d97525cd)

Solutions

1. Inspect the wrapped error; usually indicates a truncated or corrupted frame length field
2. Ensure no other process reads from the same socket

When it happens

Trigger: Thrown at internal/proto/reader.go:226 when the library encounters an invalid state.

Common situations: Keep socket ownership exclusive to the client connection.

AI-assisted analysis of go-redis/redis@36d97525cd (2026-08-06). Data as JSON: /data/errors/f9eca294c60b549f.json. Report an issue: GitHub.